P0307 on Dodge: How to Diagnose & Fix
Cylinder 7 Misfire Detected
3 Dodge models · 4 documented issues · 1 critical · $100-$5,000 repair
P0307 on Dodge by model: symptoms, diagnosis and fix
HEMI engines with Multi-Displacement System (MDS) can develop a ticking noise from the MDS lifters. This is most noticeable at idle and during light acceleration. While often not immediately harmful, it can indicate lifter wear.
Common Symptoms
- Ticking noise at idle
- Tick that follows engine RPM
- Noise louder when warm
- Tick comes and goes
- Sound from top of engine
How to Fix
Use quality synthetic oil meeting Chrysler MS-6395 spec. MDS delete kit available for permanent solution. Some owners have had lifters replaced under extended warranty. Regular oil changes help minimize tick.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Mopar 53022263AF 5.7L HEMI MDS/VVT camshaft
Replace only when inspection shows lifter-related lobe damage Fitment: Verified 5.7L branch; not the 6.4L camshaft Live OEM direct product page when checked
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Sources for this issue (2)
HEMI engines with Multi-Displacement System (MDS) can develop a ticking noise from the MDS lifters. This tick is most noticeable at idle and during light acceleration. While often not causing immediate damage, it can indicate lifter wear that may eventually require attention.
Common Symptoms
- Ticking noise at idle
- Tick that follows engine RPM
- Noise louder when engine is warm
- Tick comes and goes
- Noise from top of engine
How to Fix
Use quality synthetic oil meeting the spec in your owner's manual (Chrysler MS-6395 for the 5.7L; MS-12633 0W-40 for the 6.4L). Consider MDS delete kit if desired permanent solution. Some owners have had lifters replaced under extended warranty. Regular oil changes help minimize tick.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar 53022298AB Multiple Displacement Solenoid
Replace only when testing shows the solenoid/control branch is faulty rather than a collapsed lifter or worn cam Fitment: 2010-2024 5.7L/6.4L MDS applications per live title; confirm the vehicle actually has MDS Live direct US performanc…
Sources for this issue (2)
Some 2015-2021 Dodge Challenger 5.7L and 6.4L engines can develop a persistent engine-speed-related tick, rough idle, loss of power, or misfire from hydraulic roller-lifter, roller, or cam-lobe wear. A tick alone does not prove internal wear: exhaust-manifold leakage, injector noise, oil-pressure concerns, and other causes must be ruled out. MDS fitment is transmission-specific, not engine-name-wide: automatic 5.7L and 6.4L applications use cylinder deactivation, while six-speed manual applications are non-MDS. Cam and lifter wear is not limited to MDS hardware.
Common Symptoms
- Ticking noise at idle
- Tick more prominent on cold start
- Noise from top of engine
- Rough idle
- Loss of power
- Engine misfire
How to Fix
Retrieve DTC and misfire data, localize the noise, and check for exhaust-manifold leakage before buying internal parts. If cam/lifter wear is suspected, inspect the lifter rollers and cam lobes and check the VVT oil-control-valve screen for metal debris. Use the lifter type that matches the factory transmission/MDS configuration and verify by VIN. On an automatic-MDS car, non-MDS lifters are only one part of a complete engineered mechanical delete with compatible cam/supporting parts and calibration. Correct oil and electronic MDS disabling do not repair a worn lifter, roller, or camshaft.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar 5038785AD front MDS hydraulic lifters and yoke pack
Front-position MDS lifter pack for a confirmed MDS valvetrain repair after the heads are removed and roller/cam damage is inspected Fitment: Live fitment lists 2009-2023 Challenger 5.7L/6.4L, but the year-specific catalog specifies MDS/f…
- Genuine Mopar 5038786AD rear MDS hydraulic lifters and yoke pack
Rear-position companion pack for a complete factory-MDS lifter repair Fitment: Live fitment lists 2009-2023 Challenger 5.7L/6.4L; pair with the front packs only on a verified MDS engine, and confirm that two front plus two rear packages …
- Genuine Mopar 5038784AD complete non-MDS HEMI lifter/yoke bundle
Complete lifter branch for a factory non-MDS/manual-transmission 5.7L or 6.4L after cam and roller inspection confirms replacement Fitment: Live bundle explicitly contains 16 lifters and four yokes and lists 2015-2023 Challenger 5.7L/6.4…
- Genuine Mopar 53022372AA 5.7L MDS/VVT camshaft
Camshaft replacement when lifter-roller failure has visibly or measurably damaged a lobe on the verified 5.7L MDS engine Fitment: Year-specific catalogs identify this as the 5.7L MDS cam; direct fitment lists 2009-2023 Challenger 5.7L. D…
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Sources for this issue (3)
The production valve springs on the 6.4L 392 HEMI can crack or fracture. A weakened spring can cause a persistent single-cylinder misfire that remains after plug, coil, or injector swaps; a complete fracture can let the valve contact the piston and cause major cylinder-head or engine damage. High-RPM and modified/cammed use changes valvetrain load, but the correct replacement spring must be selected from the camshaft's lift and required installed/open pressures rather than from boost alone.
Common Symptoms
- Persistent single-cylinder misfire that does NOT go away after replacing spark plugs, coil packs, or injectors
- Rough idle, stuttering, and a shaking/vibrating engine
- Check engine light flashing under load (active misfire)
- Loss of power and the car going into limp/reduced-power mode
- Low compression on the affected cylinder during a compression or leak-down test
- Ticking, clattering, or valvetrain noise from one bank
- In a full failure: severe knocking, loss of a cylinder, then catastrophic engine failure (dropped valve)
- Symptoms most often appear after track use, hard high-RPM driving, or on modified/cammed/boosted cars
How to Fix
Stop driving if a broken spring is suspected. Confirm the fault with compression or leak-down testing and valve-cover inspection before buying parts. For affected 2021-2022 Challenger/Charger 6.4L vehicles, FCA GPOP bulletin 9004444 directs technicians to replace all valve springs after a broken spring is confirmed, not only the failed spring; other model years should follow the current VIN-specific service procedure. The OEM production repair uses sixteen 5037382BC springs. Mopar Performance 68277306AA is an individual higher-lift spring: a full 6.4L engine requires sixteen plus correctly sized shims, and the spring must match the camshaft's lift and pressure requirements. Aftermarket PAC/BTR/Comp/Livernois sets should likewise be selected to the cam manufacturer's specification.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- High Horse Performance bundle of 16 genuine Mopar 5037382BC production valve springs
Full-engine production-spring repair after compression/leak-down and valve-cover inspection confirms a broken or weakened spring Fitment: 2011-2023 Challenger 6.4L 392 HEMI subset in this issue; the live title extends through 2024 and ex…
- Mopar Performance 68277306AA beehive valve spring
Modified/cammed engine branch only when the camshaft manufacturer specifies this spring's lift and pressure characteristics Fitment: One spring; sixteen plus correctly sized shims are required for a full 6.4L engine, and this must not be…
- OTC 5609 cylinder leakage tester kit
Confirmation tool before buying valve-spring parts; distinguishes valve leakage from rings, cylinder walls or head-gasket leakage Fitment: Universal professional test tool with 14 mm hose and 10/12/18 mm adapters; requires a regulated co…
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Sources for this issue (2)
P0307 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0307 mean on a Dodge?
P0307 stands for "Cylinder 7 Misfire Detected." P0307 means the engine computer detected a misfire on cylinder number 7 — that cylinder isn't burning its air/fuel mixture completely or at the right moment. The PCM senses this by watching for tiny slowdowns in crankshaft speed each time cylinder 7 should fire. A misfire wastes fuel, can dump raw fuel into the exhaust, and may damage the catalytic converter over time, which is why a persistent or severe misfire often makes the check engine light flash. You may feel rough idle, shaking, hesitation, or a loss of power. On Dodge it is documented across 3 models: Durango, Charger, Challenger.
What are the most common causes of P0307?
The most common causes of P0307 are: Worn, fouled, or incorrectly gapped spark plug on cylinder 7, Failed ignition coil or coil-on-plug for cylinder 7, Faulty, clogged, or leaking fuel injector, Vacuum or intake air leak affecting that cylinder, Low compression (worn rings, burnt/leaking valve, head gasket), Damaged spark plug wire or boot (on applicable engines), Carbon buildup or sticking valve. The specific cause varies by vehicle.
How much does it cost to fix P0307 on a Dodge?
Published repair estimates on Dodge range from $100 to $5,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.