What does code P1657 mean on Audi vehicles?
A short to positive has been detected in the A/C clutch relay circuit.
OBD-II Code Audi
P1657 — Audi — A/C Clutch Relay Circuit Short to B+
A short to positive has been detected in the A/C clutch relay circuit.
Common symptoms
- A/C engages incorrectly.
Possible causes
- Faulty wiring.
Initial recommendation
Inspect A/C clutch relay circuit.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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