Fault code P0575 – cruise control input circuit malfunction

Fault code P0575 is called “Cruise Control Input Circuit Malfunction” but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II.

Technical description and explained code P0575

This diagnostic trouble code (DTC) is a generic code. Error P0575 is considered a generic code because it applies to all makes and models of vehicles. Although the specific repair steps may vary slightly from model to model.

Fault code P0575 – cruise control input circuit malfunction

Cruise control was designed for comfort, the sole purpose of which is to maintain the vehicle speed set manually by the driver. The driver does not need to control the accelerator pedal.

If the car is equipped with an automatic transmission, he can control and adjust the shifts according to the driving conditions in real time.

This code refers to the input circuit in the cruise control system. Refer to your service manual to determine which wire or circuit to focus on. Since the signal circuit may vary from manufacturer to manufacturer.

The body control module monitors driver requests to the cruise control system and sends these requests to the engine computer (PCM). If the control module detects an invalid level of input signal from the cruise control switches, code P0575 will be set.

Symptoms of vehicle malfunctions

The main signal that an error P0575 has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.

It can also be warning signs such as:

  1. Cruise control lamp on the dashboard is off or on all the time.
  2. Cruise control does not work completely.
  3. Unstable operation of the cruise control.
  4. Some functions do not work as they should (e.g. setting, resuming, accelerating, etc.).
  5. Cruise control turns on but does not work.
  6. Unable to set the cruise control to the desired speed.

Code P0575 has a low degree of severity, as it does not affect the safety and major components of the car. But, like any electrical problem, it is better to eliminate it, so that the malfunction does not worsen in the future.

Factors that can cause this error code

The error code P0575 can mean that one or more of the following problems have occurred:

  • Cruise control switch is defective.
  • Wiring problem (breakage, chafing, etc.).
  • Faulty connector (e.g. corroded contacts).
  • Blown fuse.
  • Debris and dirt mechanically interfering with the cruise control switch.
  • Cruise control module is defective.
  • Sometimes the cause is a defective PCM module.

How to fix or reset OBD-2 code P0575

Some suggested steps for troubleshooting and fix the error code P0575:

  1. Usually you just need to repair or replace the damaged wires to fix this error.
  2. It is also necessary to check the connection connectors.
  3. You should check for debris that is interfering with the cruise control switch.
  4. If no problems are found, the cruise control module or PCM may be defective.

Diagnose and repair of problems

The first step in the P0575 troubleshooting process is to review the Technical Service Bulletins (TSB). For known problems with a particular vehicle.

Next, locate the vehicle’s multi-function cruise control switch and visually inspect it for contamination. Plastic buttons get dirty very easily, causing them to not function properly.

Make sure that the mechanical operation of the switch is smooth and uninterrupted. Any problem should be corrected.

To access the connectors and harnesses of the cruise control switch input circuit, you may need to remove the protective plastic. After that, check the continuity of the wires and connections.

A problem with the PCM module is, in most cases, a last resort to diagnose error P0575. Given the fact that this can be one of the most expensive repairs, it’s best to leave it to the professionals.

On which vehicles does this problem occur most frequently

Fault code P0575 can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:

  • Chevrolet (Silverado, Tahoe)
  • Citroen (C4)
  • Dodge (RAM)
  • Ford
  • GMC
  • Mahindra
  • Nissan (Qashqai)
  • Opel
  • Peugeot (308)
  • Toyota
  • Volkswagen
  • LADA (Vesta)

Fault code P0575 can sometimes be found with other errors. The most common are the following: P0300, P0576, P0577, C0561, U0073, U0100.


Rate article
AutoNevod | Technical description of OBD-2 car faults and their solution
Add a comment