Possible Causes
- The engine control module measures a signal that remains high when transitions are expected
- Battery disconnection resulting in errors in engine off time (short soaks may look like long soaks)
- Electric block heater applied and not detected
- Connector is disconnected, connector pin is backed out, connector pin corrosion
- Fuse failure
- Manifold absolute pressure and temperature sensor circuit, short circuit to ground, short circuit to power, open circuit, high resistance
- Manifold absolute pressure and temperature sensor failure
- Air charge coolant pump and control circuit, short circuit to ground, short circuit to power, open circuit, high resistance
- Air charge coolant pump relay failure
- Air charge coolant pump failure