P2AF7Starter Relay D Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2AF7 is the open-circuit or general fault on the control line of a fourth starter relay, relay D. Four separately monitored starter relays only make sense where there is more than one cranking path, for example a pinion relay, a second starter or a battery isolation stage on a stop-start engine. No manufacturer documents P2AF7 publicly, and the Stellantis bulletins that use relay C do not name a relay D. CARB requires engine computers to monitor output components for lost continuity. As a comparison, GM considers its relay A and B outputs open once the circuit looks like 200 kΩ or more toward ground, after 40 failures in 50 samples. Typical causes are a broken wire, a corroded plug, an open coil or a blown supply fuse. P2AF8 and P2AF9 separate the grounded and the live control wire.
- What you may notice
- Auto-stop not available
- Intermittent no-crank
- Stored code, lamp depending on manufacturer
- Likely causes
- LikelyBroken control wire or corroded connector
- PossibleOpen coil in relay D
- PossibleBlown fuse feeding the relay coil
- 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.