U0144moderate severityNetwork
Lost Communication with A/C Compressor Control Module
on 1998 Audi A8 3.7L V8 · AWD
What this code means
Cannot communicate with the air conditioning compressor clutch control module.
Symptoms
- A/C not engaging
- A/C compressor not running
- Climate control warning
- No cold air from vents
Common causes
- A/C compressor module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Compressor clutch failure
Diagnostic steps
- Check A/C compressor fuse
- Test module power and ground
- Check CAN wiring
- Test compressor clutch directly
- Check refrigerant pressure
Repair notes
Check refrigerant charge first, then fuses. Low refrigerant prevents compressor engagement.
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00003
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U0001
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