Faulty cruise control switch or button assembly on the steering wheel; Damaged or worn clock spring (spiral cable) in the steering column; Open or shorted wiring in the cruise control input circuit; Poor electrical connection at the cruise control switch or module connector; Failed cruise control module or ECM internal fault; Brake pedal position switch misadjusted or faulty, affecting cruise input signals

DTC codes / P05xx · Vehicle speed, idle control and auxiliary inputs / P0575

P0575Cruise Control Input Circuit

Q: What does code P0575 mean?

Cruise Control Input Circuit. P0575 is a generic powertrain code indicating that the engine control module (ECM) or cruise control module has detected an abnormal voltage or signal on the cruise control input circuit. The computer expects a specific voltage range from the cruise control switch or related inputs, and when the signal falls outside that range or is intermittent, it stores this code and typically disables cruise control operation.

P0575 is a generic powertrain code indicating that the engine control module (ECM) or cruise control module has detected an abnormal voltage or signal on the cruise control input circuit. The computer expects a specific voltage range from the cruise control switch or related inputs, and when the signal falls outside that range or is intermittent, it stores this code and typically disables cruise control operation.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Symptoms you may notice

Cruise control does not engage or drops out unexpectedly while driving
Cruise control indicator light on the dashboard may flash or stay off
Horn may not work if the cruise control switches share the same clock spring circuit
Steering wheel-mounted cruise control buttons may feel unresponsive or require extra pressure
Often no symptoms besides the warning light, with cruise control still functioning normally

Common causes, most likely first

Faulty cruise control switch or button assembly on the steering wheel
Damaged or worn clock spring (spiral cable) in the steering column
Open or shorted wiring in the cruise control input circuit
Poor electrical connection at the cruise control switch or module connector
Failed cruise control module or ECM internal fault
Brake pedal position switch misadjusted or faulty, affecting cruise input signals

How to diagnose and fix it

Use a scan tool to read live data from the cruise control switch inputs and verify the signal changes when buttons are pressed
Inspect the cruise control switch and connector for corrosion, damage, or loose pins, and clean or repair as needed
Check the clock spring for continuity and signs of wear, replacing it if resistance is out of specification
Perform a voltage drop test on the cruise control input circuit wiring to locate opens or high resistance
Test the brake pedal position switch for proper adjustment and function, as it can interfere with cruise control inputs
If all inputs and wiring check out, test the cruise control module or ECM according to the manufacturer's diagnostic procedure
Clear the code and perform a road test to confirm the repair and ensure the code does not return

Cruise Control Input Circuit Quirks

A failing clock spring often causes P0575 along with horn or airbag warning light issues, but many technicians replace the cruise switch first and miss the clock spring.
The cruise control input circuit frequently shares a reference voltage with other steering wheel controls, so a short in an unrelated button can set this code.
P0575 can be set by a momentary glitch such as a low battery or jump start, so always check for related codes and verify the fault is current before replacing parts.
On some vehicles, the cruise control switch is a resistive multiplexed circuit, and a small change in resistance from corrosion can trigger the code without any noticeable driveability problem.
A misadjusted brake pedal switch can cause the cruise control module to see an invalid input and set P0575, even though the brake lights work normally.

Can I keep driving with P0575?

The vehicle remains safe to drive because cruise control is a convenience feature and its failure does not affect primary braking or steering. Avoid using cruise control until the fault is repaired, especially in wet or slippery conditions, and address the code promptly to prevent related issues from worsening.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.