Ford Code P0073 is a diagnostic trouble code (DTC) associated with the ambient air temperature (AAT) sensor circuit. It is triggered when the sensor signal reads higher than the self-test maximum. This can be caused by various issues, including a course open, a circuit short to voltage, or a damaged AAT sensor. Diagnosing the problem with the AAT sensor quickly is important, as it can further damage the vehicle and its components if left unchecked. The following table outlines the causes and solutions to this DTC.
💥See also: Ford Code P0106
Causes and Solutions of Ford Code P0073
| Cause | Solution |
|---|---|
| AAT circuit open | Check the wiring and connections for the AAT circuit and repair or replace them if necessary. |
| AAT circuit short to voltage | Inspect the wiring and connections for any shorts and repair or replace them if necessary. |
| Damaged AAT sensor | Replace the AAT sensor with a new one. |
| Intermittent AAT sensor | Inspect the wiring and connections for any loose connections and repair or replace them if necessary. |
AAT Circuit Open
The first cause of Ford Code P0073 is an open circuit in the AAT sensor. This can occur when the wiring or connections become loose or disconnected. The wiring and links should be inspected for any loose or separate wires to diagnose this issue. If any are found, they should be repaired or replaced as necessary.
AAT Circuit Short to Voltage
Another cause of Ford Code P0073 is a short circuit in the AAT sensor. This happens when the wiring or connections become worn, damaged, and quick to the voltage source. The wiring and links should be inspected for any shorts or damaged wiring to diagnose this issue. If any are found, they should be repaired or replaced as necessary.
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Damaged AAT Sensor
The third cause of Ford Code P0073 is a damaged AAT sensor. This can occur when the sensor becomes worn or damaged from prolonged use. IF NECESSARY, the AAT sensor should be inspected and replaced with a new one to diagnose this issue.
Intermittent AAT Sensor
The last cause of Ford Code P0073 is an intermittent AAT sensor. This occurs when the wiring or connections become loose or disconnected, causing the sensor to fail intermittently. The wiring and links should be inspected for any loose or separate wires to diagnose this issue. If any are found, they should be repaired or replaced as necessary.
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Conclusion: Diagnosing Ford Code P0073
Ford Code P0073 is a diagnostic trouble code associated with the ambient air temperature sensor circuit. Various issues, including a course open, a circuit short to voltage, or a damaged AAT sensor, can cause it. If left unchecked, the problem can cause further damage to the vehicle and its components. The causes and solutions to this DTC are outlined in the table above. Inspecting the wiring and connections for any loose or disconnected wires, shorts, or damaged wiring is important to diagnose this issue. It is also important to replace the AAT sensor if it is damaged. With the proper diagnosis and repair, Ford Code P0073 can be resolved, and avoid further damage to the vehicle.
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