P0AFA on Jeep: How to Diagnose & Fix
14V Power Module System Voltage
1 Jeep model · 1 documented issue · 1 critical
P0AFA on Jeep by model: symptoms, diagnosis and fix
NHTSA campaign 23V787000 covers certain 2021-2023 Jeep Wrangler plug-in hybrid vehicles whose high-voltage battery may fail internally and cause a fire while parked or driving. That campaign was replaced by 24V720000, which was then replaced by current campaign 25V741000. Vehicles previously repaired under the earlier campaigns may need the current remedy.
Common Symptoms
- High-voltage battery fire while parked or driving
How to Fix
Check the VIN for current campaign 25V741000 (FCA recall 68C). Until the current remedy is completed, park outside and away from structures and other vehicles and do not charge the vehicle. Dealers update the high-voltage battery software and replace the battery as necessary, free of charge.
Sources for this issue (4)
P0AFA 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 P0AFA mean on a Jeep?
P0AFA stands for "14V Power Module System Voltage." P0AFA is a hybrid/electric vehicle code indicating the computer detected low voltage in the 14-volt power module system — the converter that supplies the conventional 12V/14V electrical system in a hybrid or EV (the equivalent of a traditional alternator). The 14V power module (often a DC-DC converter) steps down the high-voltage battery to power lights, accessories, and the auxiliary 12V battery. When the monitored output voltage falls below the expected threshold, this code is set. It generally indicates the low-voltage electrical system isn't being properly charged, which can lead to a dead 12V battery and a no-start condition. On Jeep it is documented across 1 model: Wrangler.
What are the most common causes of P0AFA?
The most common causes of P0AFA are: Failing DC-DC converter / 14V power module, Weak or failing auxiliary 12V battery, Corroded or loose 12V battery terminals and ground connections, Damaged wiring or connectors in the low-voltage charging circuit, Excessive electrical load draining the system, Fault in the high-voltage battery supply to the converter, Internal control module or software fault. The specific cause varies by vehicle.
How much does it cost to fix P0AFA on a Jeep?
Repair costs vary widely with the root cause and Jeep model; each issue on this page carries its own estimate where one is published.
Looking for P0AFA on a different make?
View P0AFA across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.