P2AFBStarter Relay D Stuck Off
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2AFB is set when starter relay D ignores an on command: the module energises it, but the expected change of voltage or current in the switched circuit never appears. No manufacturer documents P2AFB publicly. Stellantis shows on relay C how such a check works. Its Starter Relay 3 Stuck Off (P2AF6) is stored when both battery voltages stay equal during an auto-start although the relay should have separated them, and the published remedies range from a loose connector at the power distribution centre to new PCM software. For relay D, burnt or corroded contacts, a weak coil, low supply voltage and a poor ground are the usual suspects. Drivers may see a no-crank or an auto-stop that stays unavailable. The stuck-on counterpart is P2AFA; circuit faults are P2AF7 to P2AF9.
- What you may notice
- Engine does not crank on the affected path
- Auto-stop permanently unavailable
- Stored code, lamp depending on manufacturer
- Likely causes
- LikelyBurnt or corroded relay contacts
- PossibleLow supply voltage or poor ground at the relay
- PossibleLoose connector at the relay or distribution box
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.