P2427
PPowertrainEGR Cooler Bypass Valve Control Circuit High
What does this code mean?
Severity : MediumP2427 reports a high voltage on the EGR cooling valve control circuit (the EGR cooler bypass valve). This valve decides whether recirculated gases flow through the EGR cooler or bypass it. The module detects an abnormal signal, often an open circuit or a short to voltage.
Symptoms
- Check engine light on.
- Possible slight loss of power.
- Slower warm-up or higher emissions.
- Limp mode on some vehicles.
Possible causes
- Faulty EGR bypass solenoid or actuator.
- Wire open or shorted to voltage.
- Corroded or heat-damaged connector.
- Faulty control module, less often.
Diagnosis and repair
- Inspect the bypass valve connector and wiring.
- Measure the valve resistance with a multimeter.
- Actuate the valve with a scan tool and check it moves.
- Replace the valve or repair the wiring.
- Clear the code and road test.
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Code
P2427
Category
Powertrain
Prefix
P
Standard
OBD-II / SAE J2012