P2510
ECM/PCM Power Relay Sense Circuit Range/Performance
Engine control power supply
Generic OBD-II
Medium
What it means
P2510 means the voltage the ECM/PCM senses from its own power relay is outside the expected range. Because this circuit feeds the engine computer, an unstable signal can cause intermittent stalling, hard starting, or a no-start — so it's worth diagnosing the relay, its socket, and the wiring rather than ignoring it.
Medium
Can I keep driving? Often drivable, but the ECU's power-feed sense signal is out of range, which can cause intermittent stalling, hard starts, or a no-start if the relay circuit fails.
Common symptoms
What you'll notice
- Check-engine light on
- Intermittent stalling or hard starting
- Occasional no-start if the relay feed drops out
- Random sensor or driveability codes appearing alongside it
Common causes
Most likely first
- Faulty ECM/PCM power relayLikely
- Open, shorted, or high-resistance wiring in the relay sense circuitCommon
- Corroded or loose relay socket or ECM connectorCommon
- Low battery voltage or poor main groundLess often
- Faulty ECM/PCMLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame and check battery voltage and the main grounds first.
- Inspect the ECM power relay and its socket for corrosion, heat damage, or a loose fit; swap in a known-good relay.
- Measure the relay sense wire between the relay and ECM for opens, shorts, or high resistance.
- Confirm the relay switches full battery voltage when commanded on.
- If wiring and relay check good, suspect the ECM; clear and re-test after repairs.
FAQ
Quick answers
Is it safe to drive with P2510?+
It can be, but the ECU is warning that its power feed is unreliable. That risks sudden stalling or a no-start, so have the relay and wiring checked before relying on the vehicle.
Can I just clear P2510?+
Clearing helps confirm whether it's intermittent, but it returns while the relay or wiring is faulty. Fix the circuit rather than repeatedly clearing it.
Related codes
Often seen with P2510
Read & clear P2510 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX