C0860Trailer Stability Assist Performance
- Generic OBD-II code · Chassis
- How the car detects it
- No carmaker documents C0860 openly, and it does not appear in any accessible list. The title names trailer sway control, an extra function of the stability control that uses the existing ESC sensors to spot a swinging trailer and then brakes single wheels and trims engine torque until the combination calms down. A Bosch patent detects sway as the gap between target and measured yaw rate, filtered to roughly 0.5 to 1.5 Hz so that normal steering is ignored, and can counter it by shifting drive torque between rear wheels instead of braking. A performance fault means the function cannot work as intended. Acura shows how makers label this: on the 2007-11 MDX the warning for trailer stability assist lit up together with codes 59-1, 66-1, 67-1 or 69-1, and a faulty brake pedal position switch was to blame.
- What you may notice
- Trailer stability or ESC warning lamp on
- No automatic braking when the trailer sways
- Likely causes
- LikelyFault in an ESC input such as brake pedal switch, yaw or wheel speed signal
- PossibleTrailer not recognised because of trailer socket or wiring faults
- RareStability control software or configuration needing an update
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.