P0D78
A/C Compressor Control Module Output Driver Temperature Sensor Circuit Low
Generic OBD-II
Common symptoms
What you'll notice
- Check and replace the A/C compressor control module
- Inspect and repair any wiring or connections related to the A/C compressor control module
- Test and replace the temperature sensor
- Ensure that the A/C system is properly charged with refrigerant.
Common causes
Most likely first
- Faulty A/C compressor control module
- Malfunctioning temperature sensor
- Issues with the output driver of the A/C compressor control module
- Electrical wiring or connection problems related to the A/C compressor control module
- Environmental factors affecting the temperature sensor performance
How to diagnose & fix
Work through it in order
- A/C system fails to cool or blows warm air
- A/C compressor does not engage
- A/C system cycles on and off frequently
- A/C system produces abnormal noises
Read & clear P0D78 yourself
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