Compressor Relay Circuit
The air suspension control module has detected a circuit fault on the compressor relay output — typically open circuit, short to ground or short to power. Self-levelling is disabled and the vehicle may sit lower than normal.
Affected components
- Compressor relay
- Air compressor
- Air suspension module
- Relay wiring
Common causes
- High likelihood: Compressor relay failed (stuck or open)
- Medium likelihood: Compressor motor shorted, dragging supply down
- Low likelihood: Relay wiring or connector fault
Possible symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.