Symptoms of P042E OBD II Trouble Code
- Rough engine idle
- Diminished fuel efficiency
- Excessively lean exhaust
- Other drivability codes may be stored
Common Causes of P042E OBD II Trouble Code
- Defective EGR valve
- EGR valve plunger clogged by carbon or other debris
- EGR control solenoid/valve is bad
- Open or shorted wiring/connectors in the EGR A control circuit
- Faulty DPFE sensor
- Bad EGR valve position sensor
- PCM malfunction or PCM programming error
Severity of P042E OBD II Trouble Code
The conditions which lead to a stored code P042E may also result in serious drivability issues. For this reason, a code P042E should be addressed with urgency.