C0815
Air Suspension Compressor Overtemperature
The air suspension compressor has been disabled to protect against overheating, typically after a slow leak.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: hard
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Common causes
Ordered by how often each turns out to be the cause.
- Slow leak in air spring or lineCommon
- Compressor wornPossible
Parts involved
- Air Compressor
- Air Lines
- Air Springs
C0815 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.