The Air Temperature signal voltage for the inlet air temperature sensor is below the acceptable range.
System Response:
Electronic System Response The inlet manifold air temperature is set to 85 °C (185 °F) while the diagnostic code is active.
Service Tool Display or Lamps Caterpillar Electronic Technician (ET) will indicate 85 °C (185 °F) and display "DIAG" next to "Intake Manifold Air Temperature" on the status screen while the diagnostic code is active. The Check Engine Lamp will NOT illuminate unless this diagnostic code has been active for 10 hours.
Engine Response Occasionally, the engine may emit white smoke on start-up and misfire during cold ambient air temperatures.
Test Step 1. Perform the following diagnostic procedure: Engine Temperature Sensor Open or Short Circuit - Test
Results:
- OK - STOP