DTC P0073; Pcm Ambient Temperature Sensor Circuit High Input: Notes
WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSE
| DTC P0073:00 |
Ambient temperature sensor circuit high input |
| DETECTION CONDITION |
- The PCM monitors the input signal from the ambient temperature sensor. If the voltage from the ambient temperature sensor is above 4.89 V, the PCM determines that the ambient temperature sensor circuit has a malfunction.
Diagnostic support note
- This is a continuous monitor (other).
- The check engine light does not illuminate.
- FREEZE FRAME DATA (Mode 2)/Snapshot data is not available.
- DTC is stored in the PCM memory.
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| FAIL-SAFE FUNCTION |
Not applicable |
| POSSIBLE CAUSE |
- Ambient temperature sensor connector or terminals malfunction
- PCM connector or terminals malfunction
- Ambient temperature sensor malfunction
- Short to power supply in wiring harness between ambient temperature sensor terminal A and PCM terminal 2I
- Open circuit in wiring harness between the following terminals:
- Ambient temperature sensor terminal A-PCM terminal 2I
- Ambient temperature sensor terminal B-PCM terminal 2AJ
- PCM malfunction
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