P2425

EGR Cooling Valve Control Circuit/Open

EGR / emissions Generic OBD-II Medium

What it means

P2425 means the ECM has detected an open or fault in the control circuit for the EGR cooling (cooler bypass) valve, which routes exhaust gas through the EGR cooler. Drivability is usually unaffected, but the emissions system and EGR cooling won't work correctly until the circuit is repaired.

Medium

Can I keep driving? Generally drivable — this affects EGR cooling and emissions rather than day-to-day running, but fix it to avoid higher combustion temperatures and a failed emissions test.

Real-world scan data

Seen in

426

scans in the past year

Found in

0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P2425 scans

P261Ain 16.2% of scans

P0103in 13.8% of scans

P0045in 13.6% of scans

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
Usually little or no change in drivability
Possible higher engine/exhaust temperatures
May fail an emissions test

Common causes

Most likely first

Faulty EGR cooler bypass valve control solenoidLikely
Open or short in the control circuit wiringCommon
Corroded or loose connector at the valveCommon
Poor ground or missing supply voltage to the valveLess often
Failed control driver in the ECMLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data and confirm the circuit fault type (open vs short).
Inspect the EGR cooling valve connector and control wiring for damage.
Check the control circuit for an open against spec with the key on.
Verify the valve's power and ground.
Replace the EGR cooling/bypass valve if it fails to respond, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P2425?+

Usually yes, since it mainly affects EGR cooling and emissions, but repair it to keep combustion temperatures and emissions in check.

Can I just clear P2425?+

It will come back once the ECM rechecks the circuit unless the valve or its wiring is repaired.

Read & clear P2425 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