DTC P0074: Ambient Air Temperature Sensor Circuit Intermittent/Erratic
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
P0074 - AMBIENT AIR TEMPERATURE SENSOR CIRCUIT INTERMITTENT/ERRATIC
| Description: | The powertrain control module (PCM) continuously monitors the AAT circuit for concerns. This DTC sets if the PCM detects a sudden change in the ambient air temperature (AAT) sensor signal that changes beyond the minimum or maximum calibrated limit. | ||
| Possible Causes: |
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| Diagnostic Aids: | Check the harness and connection. Monitor the sensor PID while wiggling and bending the harness from the sensor to the PCM. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST FA . | ||