P2510

ECM/PCM Power Relay Sense Circuit Range/Performance

Q: 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.

Q: 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.

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.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

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.

Read & clear P2510 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX