P2AF5 code meaning
Starter Relay C Stuck On
Powertrain system Generic code P2Axx codes Check engine light
What P2AF5 means
P2AF5 means starter relay C remains in its energised state when it should have dropped out. Stellantis uses it as Starter Relay 3 Stuck On for the power control relay of its dual-battery stop-start system: Jeep Grand Cherokee 2021 to 2025, Wagoneer and Grand Wagoneer 2022 to 2025, RAM 1500 2025, and earlier Pacifica, Durango, Compass, Wrangler and Gladiator. In normal driving the relay is released and closed, so the main battery also charges the auxiliary one; if the PCM still sees a voltage gap between the two above a calibrated limit, it stores P2AF5 and disables stop-start. Owners report no cranking, no start or a dead auto-stop function. Stellantis checks battery terminals, the 150 A fuses and distribution centre connections, and notes false fails with a flat auxiliary battery that a battery disconnect clears.
P2AF5 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P2AF5
- No crank or no start
- Stop-start inoperative, service message for the system
- Auxiliary battery not being charged
Common causes of P2AF5
- Most likelyLoose or corroded B+ connection at main or auxiliary battery
- Most likelyDepleted auxiliary battery causing a false fail
- PossibleOpen or poorly seated 150 A fuse or fuse array
- Less likelyPower control relay mechanically stuck
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Starter relay cWiring harnessECM
What each part of P2AF5 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| A | Area: hybrid propulsion. |
| F5 | The exact fault in that area. |
What to do next
- Note P2AF5 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2AF5
What does P2AF5 mean?
P2AF5 means "Starter Relay C Stuck On". P2AF5 means starter relay C remains in its energised state when it should have dropped out. It is a generic code, so it means the same on every make.
Is it safe to drive with P2AF5?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2AF5 fail an emissions test?
P2AF5 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2AF5 to fix?
Difficulty: easy. A typical repair takes 0.3 to 1.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2AF5 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.