P0574Cruise Control System Vehicle Speed Too High
- 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. P0574 is a condition code: cruise control is active, but road speed exceeds its upper limit or clearly exceeds the set speed – for example downhill when engine braking is not enough, or with an implausible speed signal. Cruise control is then switched off. No manufacturer document available to us uses this code.
- What you may notice
- Cruise control switches off at high speed
- Cruise control locked out
- No check engine light, engine runs normally
- Likely causes
- PossibleDriving situation (long descent, towing) where speed cannot be held
- PossibleImplausible speed signal (speed sensor, ABS wheel speed)
- RareSoftware or cruise logic
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.