Possible Causes
- Electrical Cause
- Mechanical Cause
- Control Module Cavity
- Circuit reference - I_A_IMTS -
- Monitor Description
- After greater than 8 hour engine off time, all temperature sensor reading are averaged at start except the outlier, each temperature sensor is compared to the average, and if there is a large difference a DTC is set after the engine has started
- Prioritized List of Possible Causes
- Battery disconnection resulting in errors in engine off time (short soaks may look like long soaks)
- Block heater active but not detected
- 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