P0575Cruise Control Input Circuit
- 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. At GM and Saab P0575 is not an analogue circuit fault but the plausibility of the CAN message carrying the button state from the body module: wrong checksum or rolling count in 9 of 17 messages (2014: 3 of 10 frames). Other makers use it literally as a general input circuit fault with P0576/P0577.
- What you may notice
- Cruise control inoperative, possibly further U codes
- Cruise control locked out
- No check engine light, engine runs normally
- Likely causes
- PossibleBody module faulty or software (invalid message)
- PossibleCAN disturbance (connectors, wires, termination)
- PossibleSteering wheel switch fault (B3794 in the body module)
- RareEngine module
- Repair
- Hard · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.