LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chrysler >> 2002 >> PT Cruiser Limited, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0107: Map Sensor Volts Too Low >> Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0107: Map Sensor Volts Too Low: Testing

  1. Turn the ignition on. With the DRBIII®, read the MAP Sensor voltage. Is the voltage below 1.2 volts? If yes, go to step  3. If no, go to next step.
  2. Start the engine. With the DRBIII®, read the MAP Sensor voltage. Is the voltage below .04 volts? If yes, go to next step. If no, go to step  11.
  3. Turn the ignition off. Disconnect the MAP Sensor harness connector. Turn the ignition on. Measure the voltage of the 5-Volt Supply circuit in the MAP Sensor harness connector. Is the voltage between 4.5 to 5.2 volts. If yes, go to next step. If no, go to step  8.
  4. With the DRBIII®, monitor the MAP Sensor voltage. Is the voltage above 1.2 volts? If yes, replace the MAP Sensor. If no, go to next step.
  5. Turn the ignition off. Disconnect the PCM harness connectors. Measure the resistance of the MAP Sensor Signal circuit between the MAP Sensor harness connector and ground. Is the resistance below 100 ohms? If yes, repair the MAP Sensor Signal circuit for a short to ground. If no, go to next step.
  6. Measure the resistance between the MAP Sensor Signal circuit and the MAP Sensor ground circuit in the MAP Sensor harness connector. Is the resistance below 100 ohms? If yes, repair the MAP Sensor Signal circuit for a short to the MAP Sensor ground circuit. If no, go to next step.
  7. There are no possible causes remaining, replace PCM. Program the new PCM. See PROGRAMMING .
  8. Turn the ignition off. Ensure the MAP Sensor is disconnected. Disconnect the PCM harness connectors. Measure the resistance of the 5-Volt Supply circuit in the MAP Sensor harness connector to ground. Is the resistance below 100 ohms? If yes, repair the 5-Volt Supply circuit for a short to ground. If no, go to next step.
  9. Measure the resistance of the 5-Volt Supply circuit between the MAP Sensor harness connector and the PCM C2 harness connector. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the 5-Volt Supply circuit for an open.
  10. There are no possible causes remaining, replace PCM. Program the new PCM. See PROGRAMMING .
    11. 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.
  11. 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