Possible Causes
- Electrical Cause
- Mechanical Cause
- Evaporative emission system integrity
- Incorrect purge valve installed
- Connector is disconnected, connector pin is backed out, connector pin corrosion
- The powertrain control module may not be calibrated with the latest level of software. Earlier levels of software may lead to this DTC being set
- Incorrect powertrain control module installed
- EVAP system differential pressure sensor circuit short circuit to ground, short circuit to power, open circuit, high resistance
- EVAP system differential pressure sensor failure