LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chrysler >> 2002 >> PT Cruiser Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0111: Intake Air Temp Sensor Performance >> Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0111: Intake Air Temp Sensor Performance: Testing

    NOTE: If DTC P1192 or P1193 have set along with P0071, diagnose P1192 or P1193 first before continuing. See DIAGNOSTIC TROUBLE CODE DEFINITIONS .
  1. Turn the ignition on. With the DRBIII®, read DTCs. Is the Good Trip counter displayed and equal to zero? If yes, go to next step. If no, go to step  7.
  2. Turn the ignition off. Disconnect the Inlet Air Temperature Sensor harness connector. Turn the ignition on. With the DRBIII®, read the IAT voltage. Is the voltage above 4.6 volts? If yes, go to next step. If no, go to step  4.
  3. Turn the ignition off. Using a jumper wire, jumper across the Inlet Air Temperature Sensor harness connector. Turn the ignition on. With the DRBIII®, read the IAT voltage. Is the voltage below 1.0 volt? If yes, replace the Inlet Air Temperature Sensor. If no, go to next step.
    4. NOTE: Ensure the voltmeter leads meet the terminals in the connector and that there is good terminal to wire connection. Ensure the voltmeter leads are connected for positive polarity.
  4. Perform a voltage drop test by backprobing between the Sensor ground circuit at the Inlet Air Temperature Sensor harness connector and PCM C2 harness connector. Start the engine. Allow the engine to idle. Is the voltage below 0.10 volt? If yes, go to next step. If no, repair the high resistance in the Sensor ground circuit.
  5. Perform a voltage drop test by backprobing between the Inlet Air Temperature Sensor Signal circuit at the Inlet Air Temperature harness connector and PCM C2 harness connector. Start the engine. Allow the engine to idle. Is the voltage below 0.10 volt? If yes, go to next step. If no, repair the high resistance in the Inlet Air Temperature Sensor Signal circuit.
  6. There are no possible causes remaining, replace PCM. Program the new PCM. See PROGRAMMING .
    7. WARNING: When the engine is operating, do not stand in a direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing.
  7. The conditions that set the DTC are not present at this time. The following may help in identifying the intermittent condition. With the engine running at normal operating temperature, monitor the DRBIII® parameters related to the DTC while wiggling the wiring harness. Look for parameter values to change and/or a DTC to set. Review the DRBIII® Freeze Frame information. If possible try to duplicate the conditions under which the DTC was set. Refer to any Technical Service Bulletins (TSB) that may apply. Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals. Were any of the above conditions present? If yes, repair as necessary. If no, test is complete.
scientia non olet · About LEMON Manuals