P2AFAStarter Relay D 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
- P2AFA describes starter relay D staying engaged although the control module has commanded it to release; the module infers this from a feedback signal, a voltage or current that should have changed. No manufacturer documents P2AFA publicly. The closest published case is relay C at Stellantis, where Starter Relay 3 Stuck On (P2AF5) is detected from the voltage gap between main and auxiliary battery. A relay welded closed in a cranking path can keep the starter spinning after the engine fires, which risks damage to starter and ring gear, whereas a stuck battery isolation relay mainly blocks stop-start and the charging of the second battery. Causes are welded contacts, a live control wire (see P2AF9) or a faulty driver. The opposite stuck fault is P2AFB.
- What you may notice
- Starter keeps turning or grinding after the engine starts
- Stop-start disabled
- Battery drain while parked
- Likely causes
- LikelyWelded relay contacts
- PossibleControl wire receiving voltage from another circuit
- RareOutput driver not switching off
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.