According to Au7o's analysis of 1,203+ owner reports, the 2009 Ford F-150 has 15 documented known issues, with 4 rated critical. The most serious are Brake Line Corrosion and Hydraulic Failure (Salt-Belt 11th/12th-Gen F-150) ($300-$1,500 repair), Fuel Pump Driver Module (FPDM) Corrosion and No-Start / Stalling ($150-$450 repair), Internal Radiator Transmission Cooler Fails — Coolant/ATF Cross-Contamination ('Strawberry Milkshake') ($400-$1,500 repair) and 5.4L Triton 3-Valve Cam Phaser / Timing Chain "Death Rattle" ($1,500-$2,800 repair). The most commonly reported issue is Brake Line Corrosion and Hydraulic Failure (Salt-Belt 11th/12th-Gen F-150) with 765 owner reports. Across all issues with published estimates, repair costs range from $25 to $4,000. DIY maintenance guides at au7o.io.
Ford Motor Company (Ford) is recalling certain 2024 F-150 vehicles. The steering column lower shaft may have been secured to the steering gear assembly with an incorrect fastener, which can result in the separation of steering components and cause a loss of steering control.
Campaign #24V32900010/05/2024
VISIBILITY:WINDSHIELD
Ford Motor Company (Ford) is recalling certain 2024 F-150 vehicles. The windshield may not have been properly bonded to the vehicle, allowing it to detach during a crash. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 212, "Windshield Mounting."
Campaign #24V48600028/06/2024
ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION
Ford Motor Company (Ford) is recalling certain 2024-2025 F-150, 2024 Expedition and 2024 Lincoln Navigator vehicles equipped with a 3.5L GTDI engine. The engines may have a misaligned engine cup plug, which can result in a rapid oil leak.
Campaign #24V85100020/12/2024
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According to Au7o's analysis of 1,203+ owner reports, the 2009 Ford F-150 has 15 documented issues. The most frequently reported are: Brake Line Corrosion and Hydraulic Failure (Salt-Belt 11th/12th-Gen F-150), Fuel Pump Driver Module (FPDM) Corrosion and No-Start / Stalling, Internal Radiator Transmission Cooler Fails — Coolant/ATF Cross-Contamination ('Strawberry Milkshake'). Of these, 4 are rated critical and should be addressed promptly.
Is the Ford F-150 reliable?
The 2009 Ford F-150 has 15 known issues documented across 1,203+ owner reports. 4 issues are rated critical: Brake Line Corrosion and Hydraulic Failure (Salt-Belt 11th/12th-Gen F-150) and Fuel Pump Driver Module (FPDM) Corrosion and No-Start / Stalling and Internal Radiator Transmission Cooler Fails — Coolant/ATF Cross-Contamination ('Strawberry Milkshake') and 5.4L Triton 3-Valve Cam Phaser / Timing Chain "Death Rattle". Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Ford F-150 problems?
Repair costs for known Ford F-150 issues range from $25 to $4,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Brake Line Corrosion and Hydraulic Failure (Salt-Belt 11th/12th-Gen F-150), typically costs $300-$1,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2004-2014 Ford F-150 Brake Line Corrosion and Hydraulic Failure (Salt-Belt 11th/12th-Gen F-150)?
2004-2014 Ford F-150 brake lines, hoses, and ABS hydraulic components corrode aggressively in salt-belt states. Steel brake lines along the frame rust through, causing sudden loss of brake fluid and reduced or no pedal feel. Front and rear hard lines and rear axle flex hoses are… Repairs typically run $300-$1,500. Severity: high.
What is the 2004-2009 Ford F-150 Fuel Pump Driver Module (FPDM) Corrosion and No-Start / Stalling?
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
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On the 2004-2014 Ford F-150, 2004-2014 Ford F-150 brake lines, hoses, and ABS hydraulic components corrode aggressively in salt-belt states. Steel brake lines along the frame rust through, causing sudden loss of brake fluid and reduced or no pedal feel. Front and rear hard lines and rear axle flex hoses are most commonly affected. NHTSA has received numerous complaints but no recall has been issued — replacement is owner-paid ($800-$2,000+ depending on which lines need replacing). Most failures occur after 100,000 miles in northern/coastal states; southern-state trucks rarely show the pattern. Inspect annually if you drive in salt regions.
Common Symptoms
Brake pedal fades to the floor
Sudden loss of braking power
Brake fluid loss or leaks
Rear brake hose separation
ABS light on with poor braking
How to Fix
Inspect all steel brake lines, rear flex hoses, calipers, ABS hydraulic components, and the master cylinder/booster interface for leaks or corrosion. Repairs commonly include replacing rusted lines with pre-bent or custom nickel-copper lines, new rear hoses, and sometimes a master cylinder and booster; typical cost is about $300-$1,500 depending on how much of the system is affected. Bleed the full system and verify ABS operation after repair.
Owner tips & cautions
TipIf the truck has frame rust, inspect brake lines immediately because corrosion-related brake failures are commonly reported together.
On the 2004-2009 Ford F-150, 2004-2009 Ford F-150 (11th-generation) suffers from Fuel Pump Driver Module (FPDM) corrosion. The aluminum-housed module mounts directly to a steel frame crossmember above the spare tire — the dissimilar-metal contact creates galvanic corrosion, accelerated by road salt and moisture. The aluminum case cracks, water shorts the internal circuit board, and the module stops driving the fuel pump. Symptoms: crank-no-start (most common), stalling after hitting a bump or stopping at lights, intermittent loss of power. Ford issued a recall for 2005-2006 F-150 FPDMs specifically; 2004 and 2007-2009 are not recall-covered but suffer the same defect. Owners typically pay $150-$400 for module replacement plus relocation hardware that mounts the module away from the steel frame.
Inspect the fuel pump driver module and its mounting bracket for corrosion, cracking, or water intrusion, especially on rust-belt trucks. Repair usually involves replacing the FPDM and often the corroded mounting hardware or bracket, then confirming fuel pressure and wiring integrity; typical cost is about $150-$450. If the truck still will not start, test the fuel pump and rail pressure sensor circuit next.
Owner tips & cautions
TipCheck the module above the spare tire early in diagnosis if the truck cranks but will not start.
TipInspect the mounting surface and harness connector for corrosion so the new module does not fail prematurely.
On the 1997-2010 Ford F-150, f-150s with an automatic transmission route ATF through a cooler built into the radiator end tank. When the internal barrier cracks or corrodes, the two fluids cross-contaminate: pink/foamy 'strawberry milkshake' ATF appears in the coolant and coolant gets into the transmission. Coolant is highly destructive to transmission clutches and can cause total transmission failure if driven on. The radiator can fail internally with no external leak, so owners often discover it only after shift problems or a milkshake in the overflow bottle.
Pink, foamy, milkshake-like coolant in the overflow/radiator
Coolant loss with no visible external leak
Harsh, slipping, or erratic shifting
Transmission overheating warning
Contaminated (milky) transmission fluid on the dipstick
How to Fix
Replace the radiator immediately and stop driving once cross-contamination is confirmed. Flush the cooling system thoroughly and do multiple transmission fluid/filter services (or a full flush) to purge coolant from the trans; inspect for internal transmission damage. Bypassing the radiator cooler with an external cooler prevents recurrence.
Medium ConfidenceVerified0 reportsReviewed Jul 2026
On the 2004-2010 Ford F-150, the 2004-2010 5.4L 3-valve Triton uses variable cam timing (VCT) phasers fed by clean, high-pressure engine oil. With infrequent oil changes or normal high-mileage wear, the phasers' internal vanes and locking pins wear out, the plastic timing-chain guides crack, and the hydraulic chain tensioners bleed down. The result is the notorious 'death rattle' — a loud rattle/knock on cold start and a metallic ticking at hot idle. Owners report symptoms as early as 50,000-100,000 miles. If ignored, a worn phaser or skipped chain can cause valve timing to drift (rough running, P0011/P0021/P0016 cam-correlation codes), loss of power, and in worst cases chain jump and valve-to-piston contact destroying the engine. This is one of the single most-searched, most-complained-about Ford truck engine problems of the era and a major shop money-maker.
Loud rattle or knock for several seconds on cold start
Metallic ticking or rattling at hot idle
Rough running / loss of power
Reduced fuel economy
Check engine light with cam/crank correlation codes
How to Fix
Replace the complete timing set: both cam phasers, primary and secondary timing chains, tensioners, guides, and VCT solenoids. Many owners also upgrade the oil pump and switch to a slightly heavier oil and shorter oil-change interval. A common permanent fix is a cam phaser 'lockout' kit that replaces the moving vanes with solid blocks, fixing valve timing and eliminating the failure (sacrifices VCT economy/smoothness). Critical: address at first rattle — running it risks catastrophic engine damage. OEM Ford cam phaser is 3R2Z-6A257-DA (per side); Cloyes 9-0753SK and Dorman repair kits are common full-kit cross-references. Parts $300-$900; full job with labor typically $1,500-$2,500.
Medium ConfidenceVerified0 reportsReviewed Jun 2026
On the 2004-2020 Ford F-150, the rear axle (commonly the 8.8-inch) develops a speed-dependent whine or howl as the pinion bearing and ring-and-pinion gears wear, often the most common source of axle noise on Ford trucks. The noise typically appears under acceleration or on deceleration and changes with throttle. On limited-slip units, worn clutch packs add a chatter or shudder during slow tight turns. Neglected or contaminated gear oil, and never-changed fluid, accelerate the wear.
Chatter or shudder in slow tight turns (limited slip)
Metal shavings in gear oil
Growl or rumble that worsens over time
How to Fix
Check fluid level and condition first (metal shavings = internal wear). For clutch-pack chatter, drain and refill with the correct gear oil plus Ford friction modifier. For bearing/gear whine, pull the diff cover and inspect; a howling pinion bearing or worn ring-and-pinion requires a rebuild with new bearings and proper pinion preload/backlash setup. Replace limited-slip clutches if chattering persists.
Medium ConfidenceVerified0 reportsReviewed Jul 2026
On the 1997-2010 Ford F-150, on electronic shift-on-the-fly 4WD F-150s, the transfer-case shift motor (and its internal encoder that reports gear position back to the control module) is a common failure. Owners see a flashing 4WD indicator or 'Check 4x4' message, the system fails to engage or disengage 4HI/4LO, or it cycles back to 2WD. A large share of no-4WD complaints trace to the shift motor/encoder or its corroded connector rather than internal transfer-case damage.
Verify the motor gets commanded voltage and the encoder connector pins aren't bent/corroded. If the motor receives power but doesn't rotate, replace the shift motor; if it rotates but the case doesn't shift, inspect internal parts. Clean/repair the encoder connector, and confirm the 4WD switch and control module before condemning the transfer case.
Medium ConfidenceVerified0 reportsReviewed Jul 2026
On the 2004-2024 Ford F-150, ford's 4x4 F-150s use a vacuum-operated Integrated Wheel End (IWE) system instead of conventional locking hubs: vacuum keeps the front hubs UNLOCKED in 2WD and is released to lock them for 4WD. The system relies on vacuum lines, a hood-area solenoid, and a check valve that are highly vulnerable to water, road salt, and cracking. A single leak causes the hubs to partially engage, producing a loud grinding or clicking from the front wheels under acceleration/deceleration in 2WD — a hallmark symptom that typically disappears in 4-Auto/4-High because removing vacuum fully locks the hub. It is among the most-searched F-150 4x4 noise complaints and is covered by TSBs 20-2028 and 24-2189A.
Diagnose in steps: replace the cheap IWE check valve first, inspect/replace cracked vacuum lines and the IWE solenoid (often water-drenched below the cowl), then replace the IWE hub-lock actuators themselves if grinding persists. Confirm it is the IWE and not a failed wheel hub/bearing (IWE noise goes away in 4WD; a bad bearing does not). OEM IWE actuator part numbers: 7L1Z-3C247-A (2004-2014) and HL1Z-3C247-A (2015+); check valve and solenoid sold separately. Check valve ~$15-$40; actuators ~$80-$180 each; full system repair commonly $200-$700 with labor.
Medium ConfidenceVerified0 reportsReviewed Jun 2026
On the 1997-2020 Ford F-150 All engines, f-150s have a long-running problem with rainwater entering the cab from the top rear of the cab. Two sources dominate: the foam/rubber gasket behind the high-mounted third brake light dries out and cracks, and the butyl-tape seal around the fixed rear window (or the slider track) deforms with age. Water runs down inside the cab, soaking the headliner and rear carpet and pooling behind the rear seat. Because the cab cavity drains poorly, trapped water rots the cab corners and lower rear seat area from the inside out. Owners report mildew smell, wet rear floor, foggy windows, and corroded seat-belt anchors over time. CarComplaints documents this prominently on the 2010 model year, and forum reports span the 1997-2014 trucks heavily.
Common Symptoms
Water dripping from the top of the rear window or headliner after rain or a wash
Wet rear carpet or water pooling behind the rear seat
Musty/mildew smell and interior fogging
Stained or sagging headliner at the rear
Rust forming at the lower rear cab corners
How to Fix
Pinpoint the source with a careful water test from the bottom up. If the third brake light is the source, remove it and replace the foam gasket and reseal (a common, inexpensive fix). If the rear window is leaking, the back glass must be reset with fresh butyl tape/urethane, or a cracked slider seal replaced. Dry the headliner and carpet thoroughly and treat any cab-corner rust before it perforates; verify cab drain paths are clear. Typical parts+labor for the gasket/reseal runs roughly $100-$300; bodywork for resulting rust is far more.
Medium ConfidenceVerified0 reportsReviewed Jun 2026
On the 2004-2017 Ford F-150 All engines, f-150 rocker panels and cab corners rust from the inside out. The rocker design traps road debris and moisture inside the panel, and clogged drain holes let water pool where it cannot escape, so corrosion starts behind the paint and bubbles outward before owners realize the structure underneath is rotting. Left unaddressed, the rockers and cab corners perforate, running boards/door brackets can detach, and rear doors may stop closing properly. This is documented across 2004-2008 and 2009-2014 trucks (CarComplaints flags the 2010 rockers) and continues to be a salt-belt complaint. It is distinct from the heavy frame/leaf-spring-shackle rust already catalogued — this is the cab sheet metal (rockers, lower doors, cab corners), and full rocker replacement can exceed $4,000.
Common Symptoms
Paint bubbling along the rocker panels and lower cab corners
Perforation/holes appearing at the bottom of the cab
Running boards or door brackets loosening or falling off
Rear doors not closing squarely
Visible rust behind/inside the rocker when inspected
How to Fix
Keep rocker and door drain holes clear of debris so trapped water can escape — the single best preventive step. Treat surface rust early with conversion and seal; once panels perforate, the fix is cutting out the rusted section and welding in rocker/cab-corner patch panels, then refinishing. In the salt belt, periodic underbody/cavity rinsing and a cavity-wax treatment slow internal corrosion. Inspect from inside the panel, not just the painted surface, since the rust starts hidden.
Medium ConfidenceVerified0 reportsReviewed Jun 2026
On the 2009-2024 Ford F-150, the foam gasket that seals the roof-mounted center high-mount stop lamp (CHMSL / third brake light) against the cab dries out, compresses and shrinks with heat and UV exposure, breaking the watertight seal. Rainwater then runs down inside the cab from the roof opening, soaking the headliner, rear seat area and carpet, and can corrode wiring or foster mold. It is one of the most widely reported non-powertrain complaints across multiple F-150 generations. Ford has issued TSBs on this failure over the years (e.g., 04-20-5 on the 2004 truck) and now sells an updated lamp assembly with a thicker gasket, tacitly acknowledging the original design flaw. NOTE: there is NO confirmed Ford 10-year/150,000-mile warranty extension for this repair — that program (TSB 23-074-23 / warranty extension XG1) belongs to RAM/Stellantis and was mistakenly attributed to Ford in some sources.
Water stains or wet spots on the headliner, especially rear corners
Damp or soaked carpet/floor behind the rear seats
Condensation or fog on the inside of the rear window
Water or condensation visible inside the third brake light housing
Musty/moldy smell in the cab after rain or a car wash
Occasional intermittent third brake light electrical failure from corrosion
How to Fix
Replace the CHMSL/third brake light assembly with the updated OEM lamp that uses a thicker, more durable gasket, or reseal the housing with fresh butyl tape (preferred over RTV so the bulb can still be serviced). Dry out and inspect the headliner and rear cab for water damage. Typically an inexpensive DIY or dealer repair; unlike RAM, Ford has no broad warranty-extension program covering it, so check individual model-year TSBs and any active coverage with a dealer.
On the 2004-2020 Ford F-150, ford modular V8s (and the EcoBoost V6 turbo manifolds) are notorious for snapping the small (8mm) exhaust-manifold-to-head studs/bolts. They are installed without anti-seize and corrode/fatigue from repeated heat cycling; on the turbo EcoBoost engines, a large share of the turbo/manifold weight hangs off the fasteners. The classic symptom is a ticking/tapping noise that is loudest on a cold start (when the manifold gap is widest) and fades as the engine warms and metal expands — caused by exhaust escaping past the broken fastener. It is a heavily-searched DIY topic because fasteners that break flush with the head are difficult to extract.
Ticking/tapping that is loud on cold start and quiets when warm
Exhaust smell or sound near the engine
Soot streaks at the manifold-to-head flange
Reduced power / drone in severe leaks
How to Fix
Confirm the leak (cold-start tick, soot/black streaking at the manifold flange). Replace broken studs/bolts with a hardware kit using anti-seize; studs snapped flush must be drilled out with a left-hand cobalt bit (often a 90-degree drill) and may require an EZ-out or, worst case, head removal. Inspect/replace the manifold gasket. Common parts: Dorman exhaust manifold hardware kits 03408 (gas V8) and 03430 (4.6/5.4 3V) plus OEM studs. Hardware $20-$60; professional repair commonly $300-$700, more if studs break flush or the manifold is cracked.
Medium ConfidenceVerified0 reportsReviewed Jun 2026
On the 2004-2010 Ford F-150, high-mileage Triton V8 F-150s commonly set P0420 (and/or P0430) 'catalyst efficiency below threshold' as the catalytic converter degrades and the upstream and downstream O2 sensors start reading alike. It can be caused by a genuinely worn converter, contaminated/lazy O2 sensors, or an exhaust leak upstream of the cat; long-running misfires or oil/coolant consumption can poison the cats prematurely. It is one of the highest-search emissions faults for this engine family and a frequent emissions-test failure.
Don't just replace the cat — first inspect for exhaust leaks and test upstream/downstream O2 sensor switching with a scan tool, and fix any pending misfire or lean condition that could be poisoning the cat. Replace lazy O2 sensors if indicated. If the converter is truly degraded, replace it with a CARB/EPA-compliant unit and clear the monitor after a drive cycle.
Medium ConfidenceVerified0 reportsReviewed Jul 2026
On the 2009-2014 Ford F-150 All (electrical, engine-independent), the driver's door master switch on 2009-2014 F-150s commonly fails electrically (distinct from the mechanical window-regulator/cable failure). Carbon builds up on the internal contacts from current arcing, and the switch's exposed door-panel location lets moisture in when the window is lowered in rain — both degrade the contacts. Because the master switch and the front passenger switch share wiring splices, a failing master can leave one or both front windows dead (or stuck moving), while the rear or passenger-door switches still work. Owners also report a window stuck in one position because a shorted switch constantly commands the motor. It is a high-volume, low-cost search/DIY item for this generation.
Common Symptoms
One or both front windows won't operate from the master switch
Window stuck up or down
Window operates from one switch but not the master
Intermittent operation, worse when wet
How to Fix
Test for power and ground at the switch and inspect the connector for corrosion/moisture before condemning it. The usual fix is to replace the driver's master window switch assembly (cleaning carbon-fouled contacts is a temporary fix at best). Check the relevant fuse first. OEM part numbers: 9L3Z-14529-AD / 9L3Z-14529-AE (2009-2010) and BL3T-14540-AAW for 2011-2014. Aftermarket switches are inexpensive. Switch $25-$90; about a 30-60 minute DIY, or ~$100-$200 at a shop.
Medium ConfidenceVerified0 reportsReviewed Jun 2026
On the 1997-2014 Ford F-150, the door-ajar switch built into the door latch sticks or corrodes so the truck thinks a door is open. The result is a 'door ajar' warning that stays on, interior/dome lights that won't shut off, chimes, and a parasitic battery drain that can leave the truck dead overnight. It is one of the most common and widely searched F-150 electrical annoyances across many model years, and is usually a very cheap fix.
Isolate which door by watching the message center as you cycle each latch. Spray the latch/switch with a penetrant or electrical/brake cleaner and cycle the door 10-20 times to free the contacts — this fixes most cases. If it recurs, replace the door-ajar/jamb switch or the door latch assembly. Verify the interior lights and drain are gone with a parasitic draw test.
Medium ConfidenceVerified0 reportsReviewed Jul 2026
On the 2009-2017 Ford F-150, the 6R80 six-speed automatic (2009-2017 F-150) is generally durable but is widely reported for a harsh, banging 1-2 upshift and erratic/flaring shifts, with thousands of NHTSA complaints. The internal solenoid body 'lead frame' (the mechatronic wiring carrier) can crack or develop failing solenoid calibration, and the adapt strategy struggles to relearn after service. The classic symptom is a 1-2 shift so abrupt owners describe it as a jolt that could 'knock a cup of coffee out of your hand.' Towing, worn fluid, and never-serviced 'lifetime' fluid accelerate the problem. It is a top transmission search for this generation.
Start with a full fluid-and-filter service using Mercon LV (the 'lifetime fill' should still be serviced ~every 60k, sooner with towing). Have the dealer flash the PCM/TCM to the latest calibration — Ford released shift-quality calibration updates that fix many harsh/delayed-engagement complaints as the first repair. Persistent harsh shifting or specific solenoid codes call for a solenoid body / lead-frame replacement (Ford solenoid body assembly, commonly cross-referenced as Sonnax/aftermarket units). A TCM adaptive (keep-alive) reset and relearn is required after repairs. Fluid service $200-$400; solenoid body $600-$1,200 installed; valve-body/rebuild far more.
Medium ConfidenceVerified0 reportsReviewed Jun 2026
EQUIPMENT:OTHER:LABELS
Ford Motor Company (Ford) is recalling certain 2020-2025 Explorer, Lincoln Aviator, 2020-2024 Escape, Lincoln Corsair, 2018-2024 F-150, Expedition and Lincoln Navigator vehicles. The air bag warning label may be missing from the dashboard. As such, these vehicles fail to comply with the requirement Federal Motor Vehicle Safety Standard number 208, "Occupant Crash Protection."
Campaign #24V85200008/11/2024
STEERING
Ford Motor Company (Ford) is recalling certain 2024 F-150 vehicles. The steering gear assembly may have been assembled with an incorrect rack, which can cause the gears to fracture.
2004-2009 Ford F-150 (11th-generation) suffers from Fuel Pump Driver Module (FPDM) corrosion. The aluminum-housed module mounts directly to a steel frame crossmember above the spare tire — the dissimilar-metal contact creates galvanic corrosion, accelerated by road salt and moist… Repairs typically run $150-$450. Severity: high.
What is the 1997-2010 Ford F-150 Internal Radiator Transmission Cooler Fails — Coolant/ATF Cross-Contamination ('Strawberry Milkshake')?
F-150s with an automatic transmission route ATF through a cooler built into the radiator end tank. When the internal barrier cracks or corrodes, the two fluids cross-contaminate: pink/foamy 'strawberry milkshake' ATF appears in the coolant and coolant gets into the transmission. Repairs typically run $400-$1,500. Severity: high.
What is the 2004-2010 Ford F-150 5.4L Triton 3-Valve Cam Phaser / Timing Chain "Death Rattle"?
The 2004-2010 5.4L 3-valve Triton uses variable cam timing (VCT) phasers fed by clean, high-pressure engine oil. With infrequent oil changes or normal high-mileage wear, the phasers' internal vanes and locking pins wear out, the plastic timing-chain guides crack, and the hydrauli… Repairs typically run $1,500-$2,800. Severity: high.
What is the 2009-2017 Ford F-150 6R80 6-Speed Automatic Harsh 1-2 Upshift / Erratic Shifting and Lead-Frame Solenoid Body Failure?
The 6R80 six-speed automatic (2009-2017 F-150) is generally durable but is widely reported for a harsh, banging 1-2 upshift and erratic/flaring shifts, with thousands of NHTSA complaints. The internal solenoid body 'lead frame' (the mechatronic wiring carrier) can crack or develo… Repairs typically run $250-$1,500. Severity: medium.
What is the 2004-2020 Ford F-150 Exhaust Manifold Studs / Bolts Break — Exhaust Leak and Cold-Start Ticking?
Ford modular V8s (and the EcoBoost V6 turbo manifolds) are notorious for snapping the small (8mm) exhaust-manifold-to-head studs/bolts. They are installed without anti-seize and corrode/fatigue from repeated heat cycling; on the turbo EcoBoost engines, a large share of the turbo/… Repairs typically run $50-$700. Severity: medium.
What is the 2004-2020 Ford F-150 Rear Differential Pinion Bearing / Ring-and-Pinion Whine and Howl?
The rear axle (commonly the 8.8-inch) develops a speed-dependent whine or howl as the pinion bearing and ring-and-pinion gears wear, often the most common source of axle noise on Ford trucks. The noise typically appears under acceleration or on deceleration and changes with throt… Repairs typically run $500-$1,600. Severity: medium.
What is the 1997-2010 Ford F-150 Transfer Case Shift Motor / Encoder Failure — 'Check 4x4', 4WD Won't Engage?
On electronic shift-on-the-fly 4WD F-150s, the transfer-case shift motor (and its internal encoder that reports gear position back to the control module) is a common failure. Owners see a flashing 4WD indicator or 'Check 4x4' message, the system fails to engage or disengage 4HI/4… Repairs typically run $250-$650. Severity: medium.
What is the 2004-2010 Ford F-150 Catalytic Converter Efficiency Failure — P0420/P0430 (Triton V8)?
High-mileage Triton V8 F-150s commonly set P0420 (and/or P0430) 'catalyst efficiency below threshold' as the catalytic converter degrades and the upstream and downstream O2 sensors start reading alike. It can be caused by a genuinely worn converter, contaminated/lazy O2 sensors,… Repairs typically run $500-$2,000. Severity: medium.
What is the 1997-2020 Ford F-150 Water Leak at Rear Window / Third Brake Light — Wet Headliner, Carpet, and Cab-Corner Rust?
F-150s have a long-running problem with rainwater entering the cab from the top rear of the cab. Two sources dominate: the foam/rubber gasket behind the high-mounted third brake light dries out and cracks, and the butyl-tape seal around the fixed rear window (or the slider track)… Repairs typically run $100-$600. Severity: medium.
What is the 2004-2017 Ford F-150 Rocker Panel and Cab-Corner Rust from Clogged Internal Drains?
F-150 rocker panels and cab corners rust from the inside out. The rocker design traps road debris and moisture inside the panel, and clogged drain holes let water pool where it cannot escape, so corrosion starts behind the paint and bubbles outward before owners realize the struc… Repairs typically run $300-$4,000. Severity: medium.
What is the 2009-2024 Ford F-150 Center High-Mount Stop Lamp (Third Brake Light) Gasket Leak — Water Intrusion into Cab?
The foam gasket that seals the roof-mounted center high-mount stop lamp (CHMSL / third brake light) against the cab dries out, compresses and shrinks with heat and UV exposure, breaking the watertight seal. Rainwater then runs down inside the cab from the roof opening, soaking th… Repairs typically run $40-$250. Severity: medium.
What is the 2004-2024 Ford F-150 IWE (Integrated Wheel End) Failure — Front-End Grinding and Partial 4x4 Hub Engagement?
Ford's 4x4 F-150s use a vacuum-operated Integrated Wheel End (IWE) system instead of conventional locking hubs: vacuum keeps the front hubs UNLOCKED in 2WD and is released to lock them for 4WD. The system relies on vacuum lines, a hood-area solenoid, and a check valve that are hi… Repairs typically run $100-$700. Severity: medium.
What is the 2009-2014 Ford F-150 Driver's Door Master Power Window Switch Failure?
The driver's door master switch on 2009-2014 F-150s commonly fails electrically (distinct from the mechanical window-regulator/cable failure). Carbon builds up on the internal contacts from current arcing, and the switch's exposed door-panel location lets moisture in when the win… Repairs typically run $25-$200. Severity: low.
What is the 1997-2014 Ford F-150 Door Ajar Switch Sticks — Dome Lights Stay On and Battery Drain?
The door-ajar switch built into the door latch sticks or corrodes so the truck thinks a door is open. The result is a 'door ajar' warning that stays on, interior/dome lights that won't shut off, chimes, and a parasitic battery drain that can leave the truck dead overnight. It is… Repairs typically run $40-$200. Severity: low.
