LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Chrysler >> 2004 >> Intrepid SXT >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0073: Ambient Temp Sensor High >> Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0073: Ambient Temp Sensor High: Testing

  1. Ignition on, engine not running. With the DRBIII® scan tool, read the AAT sensor voltage. Is the voltage above 4.8 volts? If yes, go to next step. If no, see INTERMITTENT CONDITION  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn the ignition off. Disconnect the AAT sensor harness connector. Ignition on, engine not running. Measure the voltage of the (K25) AAT signal circuit in the AAT sensor harness connector. Is the voltage above 5.2 volts? If yes, repair the short to battery voltage in the (K25) AAT signal circuit. If no, go to next step.
  3. Turn the ignition off. Disconnect the AAT sensor harness connector. Connect a jumper wire between the (K145) AAT signal circuit and the (K4) sensor ground circuit in the AAT sensor harness connector. Ignition on, engine not running. With the DRBIII® scan tool, read AAT sensor voltage. Is the voltage below 1.0 volt? If yes, replace the AAT sensor. If no, go to next step.
    4. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  4. Turn the ignition off. Disconnect the AAT sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance of the (K25) AAT signal circuit from the AAT sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K25) AAT signal circuit.
    5. CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller Special Tool (8815) to perform diagnosis.
  5. Turn the ignition off. Disconnect the AAT sensor harness connector. Disconnect the PCM harness connectors. Measure the resistance of the (K4) sensor ground circuit from the AAT sensor harness connector to the appropriate terminal of Miller Special Tool (8815). Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the open in the (K4) sensor ground circuit.
  6. Using the wiring diagram as a guide, inspect the wire harness and connectors. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, replace and program the PCM. See PROGRAMMING .
scientia non olet · About LEMON Manuals