Code result
C0301
Air Suspension Compressor Relay
Moderate severity
What it means
The air suspension control module has detected a fault in the compressor relay circuit. The compressor cannot be energized which prevents the system from refilling the air struts and ride height drops over time.
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
highOne of the most commonly reported causes for this code — check this first.
Relay wiring or fuse fault
mediumA plausible cause — test and verify before replacing parts.
Internal module fault
lowLess common, but worth ruling out after the more likely causes.
Related help
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