Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
4-14 Powertrain DTC Charts and Descriptions
Diagnostic Trouble Code (DTC) Charts and Descriptions
P0071 - Ambient Air Temperature Sensor Circuit Range/Performance
Description: This DTC sets when the ambient air temperature (AAT) sensor reading does not correlate with the other
temperature sensor readings at ignition ON. The PCM runs this logic after an engine off and a calibrated soak period, typically 6 to 8 hours. This soak period allows the AAT sensor and the other temperature sensors to stabilize and not differ by greater than a calibrated value, typically 18°C (32.4°F).
Possible Causes: • Damaged AAT sensor
Diagnostic Aids: Make sure the AAT sensor reading and the other temperature sensor readings are similar when the engine is
cold and the vehicle has not been in direct sun light.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test FA.
P0072 - Ambient Air Temperature Sensor Circuit Low
Description: This DTC sets when the ambient air temperature (AAT) sensor signal is less than the self-test minimum.
Possible Causes: • AAT circuit short to ground
• Damaged AAT sensor
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test FA.
P0073 - Ambient Air Temperature Sensor Circuit High
Description: This DTC sets when the ambient air temperature (AAT) sensor signal is greater than the self-test maximum.
Possible Causes: • AAT circuit open
• AAT circuit short to voltage
• Damaged AAT sensor
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test FA.
P0074 - Ambient Air Temperature Sensor Circuit Intermittent/Erratic
Description: This DTC sets when the ambient air temperature (AAT) sensor signal changes beyond the minimum or
maximum calibrated limit.
Possible Causes: • AAT circuit intermittent open
• AAT circuit intermittent short to voltage
• AAT circuit intermittent short to ground
• Damaged AAT sensor
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.
P007B - Charge Air Cooler Temperature Sensor Circuit Range/Performance (Bank 1)
Description: This DTC sets when the CAC_T PID does not correlate with the IAT or the IAT2 PIDs at ignition ON or if the IAT
PID reading is greater than a maximum calibrated value while driving.
Possible Causes: • Damaged charge air cooler temperature (CACT) sensor
• Contaminated or restricted CACT sensor
• Slow responding CACT sensor
Diagnostic Aids: Check temperature values while engine is at ambient temperature, cold soak the engine for a minimum of 6
hours if necessary. Check airflow through charge air cooler (CAC), remove debris if necessary. This DTC may be accompanied by other DTCs. Check for other DTCs and diagnose those first.
2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.