C0306
Ride Height Sensor Front Left
Ride Height Sensor Front Left: the control module has detected this fault condition. Without this signal the suspension control module cannot self-level the vehicle.
- 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.
- Ride height sensor failedCommon
- Sensor linkage broken or detachedPossible
- Wiring or connector faultLess likely
Parts involved
- Ride Height Sensor
- Air Suspension Module
- Sensor Linkage
C0306 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.