C0860
Trailer Stability Assist Performance
The trailer stability assist function detects implausible trailer sway response or sensor input.
- 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.
- Trailer module communication faultPossible
- Yaw sensor driftPossible
Parts involved
- ABS Control Module
- Trailer Recognition Module
- Yaw Rate Sensor
C0860 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.