C0820
Air Suspension Height Sensor Front Left
The front left ride height sensor reports an implausible or missing signal.
- Check engine light: Not always
- Emissions related: No
- Repair difficulty: medium
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.
- Sensor linkage brokenCommon
- Sensor failedPossible
Parts involved
- Height Sensor Fl
- Sensor Wiring
C0820 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.