P2427

EGR Cooling Valve Control Circuit High

Q: Is it safe to drive with P2427?

Short-term, usually yes. But the EGR cooler valve helps manage exhaust temperature, so have it repaired to avoid emissions or heat-related issues.

Q: Can I just clear P2427?

It returns once the ECM sees the open control circuit again. Fix the valve or its wiring first.

Exhaust gas recirculation (EGR) Generic OBD-II Medium

What it means

P2427 means the ECM detected high voltage — usually an open circuit — in the control circuit for the EGR cooling (cooler-bypass) valve. It rarely changes how the car drives, but it affects emissions and exhaust-temperature control. Common causes are a failed valve, an open control wire, or a bad connector.

Medium

Can I keep driving? Usually drivable, though you may notice minor performance or emissions issues; a stuck EGR cooler valve can raise exhaust temperatures over time.

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
Often no noticeable change in driving
Possible minor loss of performance or higher exhaust temperature
May fail an emissions test

Common causes

Most likely first

Faulty EGR cooling (cooler-bypass) valve or its control solenoidLikely
Control circuit open — a 'high voltage' reading usually means an open circuitCommon
Corroded or disconnected connector at the valveCommon
Wiring break between the ECM and the valveLess often
ECM/PCM control driver fault (less common)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and confirm the code is current.
Inspect the EGR cooling valve connector and control wiring for opens or corrosion.
Check continuity of the control wire between the ECM and the valve.
Test the valve/solenoid resistance against spec.
Replace the EGR cooling valve if the wiring is good, then clear and re-test.

FAQ

Quick answers

Is it safe to drive with P2427?+

Short-term, usually yes. But the EGR cooler valve helps manage exhaust temperature, so have it repaired to avoid emissions or heat-related issues.

Can I just clear P2427?+

It returns once the ECM sees the open control circuit again. Fix the valve or its wiring first.

Read & clear P2427 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