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Symptom: P0111-INTAKE AIR TEMPERATURE SENSOR PERFORMANCE When Monitored and Set Condition: P0111-INTAKE AIR TEMPERATURE SENSOR PERFORMANCE When Monitored: Engine off time is greater than 480 minutes. Ambient temperature is greater than -23°C (-9°F). Set Condition: After a calibrated amount of cool down time, the PCM compares the ECT Sensor, IAT Sensor and the Ambient Air Temperature Sensor values. If the IAT Sensor POSSIBLE CAUSES GOOD TRIP EQUAL TO ZERO (K21) IAT SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE IAT SENSOR VOLTAGE BELOW 0.1 VOLTS (K21) IAT SIGNAL CIRCUIT OPEN (K4) SENSOR GROUND CIRCUIT OPEN (K21) IAT SIGNAL SHORTED TO GROUND (K21) IAT SIGNAL CIRCUIT SHORTED TO (K4) SENSOR GROUND PCM HIGH PCM LOW TEST ACTION APPLICABILITY 1 Ignition on, engine not running. t, read DTCs and record the related Freeze Frame data. Is the Good Trip Counter displayed and equal to zero? All Yes → Go To 2 No → Refer to the INTERMITTENT CONDITION symptom in the Driveability category. 2 Turn the ignition off. All Yes → Repair the short to battery voltage in the (K21) IAT Signal circuit. Perform POWERTRAIN VERIFICATION TEST VER - 5. No → Go To 3 286 DRIVEABILITY - NGC |