P0575 code meaning
Cruise Control Input Circuit
What P0575 means
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.
P0575 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyHard
- Typical labor1 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0575
- Cruise control inoperative, possibly further U codes
- Cruise control locked out
- No check engine light, engine runs normally
Common causes of P0575
- PossibleBody module faulty or software (invalid message)
- PossibleCAN disturbance (connectors, wires, termination)
- PossibleSteering wheel switch fault (B3794 in the body module)
- Less likelyEngine module
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Body control moduleCAN busCruise control switchEngine control module
What each part of P0575 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 75 | The exact fault in that area. |
What to do next
- Note P0575 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0575
What does P0575 mean?
P0575 means "Cruise Control Input Circuit". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P0575?
P0575 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0575 fail an emissions test?
P0575 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P0575 to fix?
Difficulty: hard. A typical repair takes 1 to 3 hours of work. This is a job for a workshop.
Will P0575 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.