P056ACruise Control Increase Distance Signal
- Generic OBD-II code · Powertrain
- How the car detects it
- Cruise control buttons are almost always a resistor ladder on one or two signal lines, each button giving its own voltage; the module reading it (GM and Saab from about 2010: the body module; FCA: steering column module or PCM) sends the button state to the engine module over CAN. CARB names cruise control as the example of an emission-neutral diagnosis – it is simply switched off – so GM lists all these codes as type C and Ford as non-MIL: no warning lamp, the engine runs normally. P056A exists only with adaptive cruise control: the button to increase following distance is stuck or invalid. FCA's switch reads the distance button over the same ladder as the others. No manufacturer document available to us uses this code. GM and Ford mostly report adaptive cruise faults in the radar module.
- What you may notice
- Following distance cannot be increased
- Cruise control locked out
- No check engine light, engine runs normally
- Likely causes
- LikelyDistance button stuck or faulty
- PossibleMoisture or wear in the steering wheel switch
- PossibleContact resistance in clockspring or steering wheel connector
- RareBody module or cruise module
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.