P0562 on RAM: How to Diagnose & Fix
System Voltage Low
1 RAM model · 2 documented issues · 1 critical · $300-$1,800 repair
P0562 on RAM by model: symptoms, diagnosis and fix
A large number of 2025 RAM 1500 owners (especially Hurricane-equipped trucks) report repeated dead 12V batteries from a parasitic draw where body/comfort modules and proximity sensors fail to enter sleep mode after shutdown. Owners describe waking to a no-start, low system voltage, infotainment freezes, and wireless-charge pads that stay warm. One Texas owner documented an '11.7V death spiral' at under 4,000 miles, with dealers initially finding 'no fault.' Stellantis TSB 08-380-25 (November 2025) reflashes the body control module on 2025 trucks with proximity approach/departure lamps (sales code LNR) where the battery drains from interior lighting. It is a software and electrical-architecture issue on the newest 5th-gen DT trucks, not the older TIPM failure.
Common Symptoms
- Dead battery / no-start
- Low system voltage warning
- Infotainment freeze or reboot
- Wireless charging pad overheating
- Repeated battery replacement
How to Fix
Have the dealer apply the BCM/electrical-system software update that corrects the modules-won't-sleep condition (Stellantis TSB 08-380-25, a body control module reflash for 2025 trucks with proximity approach/departure lamps, sales code LNR). In the interim, a battery tender prevents dead-battery no-starts. If a dealer reports 'no fault found,' request the parasitic-draw software reflash specifically and have the 12V battery state-of-health load-tested, as repeated deep discharges can prematurely ruin the battery.
Call to confirm they can assess your vehicle and perform the stated work. Search results do not confirm qualification, eligibility or coverage.
Sources for this issue (4)
- 2025 RAM 1500 Parasitic Battery Drain — 5thGenRams Forumforum
- Ram 1500 Owner Says 2025 Rams Have a Parasitic Drain, and a Software Update Fixed It — TorqueNewsarticle
- Texas Owner's 2025 Ram 1500 Hurricane Limited Hits '11.7V Death Spiral' — TorqueNewsarticle
- TSB 08-380-25 Flash: Body Control Module (BCM) Updates — 2025 RAM 1500tsb
A repeating and clearly-defined complaint pattern on 2024-2025 RAM 1500 trucks with the 48V eTorque mild hybrid: at low speed — pulling out of a driveway, rolling in stop-and-go traffic, backing up, or the moment auto stop/start releases — the engine cuts out, the transmission independently selects PARK while the truck is still rolling, and the electric parking brake applies itself. The battery/charging telltale illuminates and some trucks display 'Reduced Battery Capacity'; owners report the alternator gauge showing no output with system voltage sitting at 12V. Restarting requires selecting PARK with the rotary shifter and pressing the start button, sometimes several times. The evidence points to the 48V belt-starter-generator charging path or the auxiliary/48V battery and its sensor dropping out under load, which the powertrain treats as a propulsion fault and responds to by securing the vehicle.
Common Symptoms
- Engine cuts out at low speed or when auto stop/start tries to restart
- Transmission shifts itself into PARK while the truck is still rolling
- Electric parking brake applies itself without driver input
- Battery or charging warning light, 'Reduced Battery Capacity' message
- Must select PARK and press start button, sometimes repeatedly, to restart
- No alternator output shown with 12V system voltage
How to Fix
Scan every module, not just the PCM: the giveaway is a cluster of low-voltage-triggered faults set at the same timestamp across ABS, BSG, TCM and the ADAS modules. Confirm charging-system output at idle with the eTorque active rather than relying on a static battery test, and check the battery negative and BSG ground terminations for looseness. As an interim measure many owners disable auto stop/start on every drive cycle, which reduces the frequency of the event but does not fix the underlying charging fault.
Sources for this issue (3)
P0562 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 P0562 mean on a RAM?
P0562 stands for "System Voltage Low." P0562 means the engine computer detected that the vehicle's system (battery/charging) voltage is too low for normal operation. The computer constantly monitors charging-system voltage because nearly every sensor, injector, and module depends on a stable supply; sustained low voltage can cause erratic behavior and other false codes. This is most often a charging or battery problem — the alternator isn't keeping up, the battery is weak, or there's resistance in the cables/grounds. You may notice dim lights, slow cranking, or multiple unrelated warning lights. On RAM it is documented across 1 model: 1500.
What are the most common causes of P0562?
The most common causes of P0562 are: Failing alternator or worn alternator brushes/regulator, Weak, old, or discharged battery, Corroded, loose, or damaged battery cables and terminals, Bad engine or chassis ground connections, Slipping, glazed, or broken serpentine/drive belt, High resistance in charging system wiring or fusible link, Faulty PCM voltage reference or charging-system control. The specific cause varies by vehicle.
How much does it cost to fix P0562 on a RAM?
Published repair estimates on RAM range from $300 to $1,800 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.