P2AF5Starter Relay C Stuck On
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Needs a drive cycle to confirm a fix
- How the car detects it
- 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.
- What you may notice
- No crank or no start
- Stop-start inoperative, service message for the system
- Auxiliary battery not being charged
- Likely causes
- LikelyLoose or corroded B+ connection at main or auxiliary battery
- LikelyDepleted auxiliary battery causing a false fail
- PossibleOpen or poorly seated 150 A fuse or fuse array
- RarePower control relay mechanically stuck
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.