P2511ECM/PCM Power Relay Sense Circuit Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2511 covers short dropouts on the line through which the engine module reads back the output of its main relay. The relay is commanded on, yet the sensed voltage briefly vanishes and returns, typical of a chattering contact, a cracked solder joint in the relay or a loose terminal in the fuse box. No manufacturer documents this code publicly with thresholds or a bulletin; even Ford's 2014 BOSS 302S list jumps from P2510 to P2512. CARB requires input circuits of the comprehensive components to be monitored, and GM's 2014 diesel tables show how the same sense signal is evaluated for P2510. Steady low or high readings are P0689 and P0690, a relay that does not follow commands is P2510. Possible effects: brief stalls or resets.
- What you may notice
- Engine may stall briefly or hesitate
- Several modules logging voltage-related codes
- Likely causes
- LikelyWorn or chattering main relay contact
- PossibleLoose relay socket or fuse box terminal
- RareSense wire breaking intermittently
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- 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.