P2510ECM/PCM Power Relay Sense Circuit Range/Performance
- 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
- P2510 judges whether the main relay of the engine module behaves as commanded, based on what the module senses on the switched supply. GM's 2014 diesel tables describe two checks. A stuck relay is one that ignores the power-down command, recognised when timer values after the after-run are longer than possible; GM counts such events in EEPROM and sets the code once the count exceeds 2 (14OBDG04) or 1 (6.6 L LML, 14OBDG10). A relay that opens too early is seen when the EEPROM write that should close the previous after-run is missing. Both run once per trip in pre-drive, type B. Ford lists P2510 for the 2014 BOSS 302S. Pure sense-circuit faults are P0689/P0690, P2511 the intermittent case.
- What you may notice
- MIL after two trips (GM type B)
- Battery drain if the relay stays closed
- Lost adaptations if the relay opens too early
- Likely causes
- LikelyMain relay contacts welded or sticking
- PossibleRelay dropping out early (weak coil, poor socket contact)
- PossibleBattery disconnected or supply lost during after-run
- RareRelay driver or EEPROM handling in the module faulty
- 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 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.