Code result
C0317
Compressor Relay Circuit
Moderate severity
What it means
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.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Compressor relay failed (stuck or open)
highOne of the most commonly reported causes for this code — check this first.
Compressor motor shorted, dragging supply down
mediumA plausible cause — test and verify before replacing parts.
Relay wiring or connector fault
lowLess common, but worth ruling out after the more likely causes.
Related help
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