Possible Causes
- The powertrain control module has determined failures where some circuit quantity, reported via serial data, is below a specified range
- Exhaust gas temperature sensor pre turbine circuit short circuit to ground, open circuit, high resistance
- Connector is disconnected, connector pin is backed out, connector pin corrosion
- Air induction system leakage
- Diesel oxidation catalyst mechanical integrity
- Exhaust gas temperature sensor pre turbine failure