P0504 GMC code

The P0504 code is defined as “Brake Switch A/B Correlation” and is a generic diagnostic trouble code (DTC) generated by the engine control module (ECM) of your car. P0504 indicates that the ECM has detected a malfunction in the brake light switch signal circuit (stop lamp or stop light switch circuit).

How do I fix code P0572?

How Is the Code P0572 Fixed?

  1. Adjusting the brake light switch.
  2. Replacing a blown fuse (or fuses).
  3. Replacing a defective brake pedal and brake light switch.
  4. Replacing or repairing faulty wiring, connectors, and so on.
  5. Replacing a faulty cruise control module.


How do I fix code P0571?

What repairs can fix the P0571 code?

  1. Electrical components and connections will be inspected for signs of damage or wear.
  2. Any wires or connections that do not appear to be in good working order will be repaired or replaced.
  3. Once the wiring is all in good shape, the mechanic will inspect the brake pedal and brake switch.
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What is brake light switch?

The brake light switch on your vehicle serves an important safety function. When you press the brake pedal, it supplies power to the signal lights at the back of your vehicle to warn other drivers you have slowed.

What is code P0573 mean?

P0573 code gets stored once your vehicle’s PCM senses an abnormal resistance/voltage level in the cruise control brake switch circuit during this test. That feedback essentially tells it speed cannot be controlled and thus cruise control must be prohibited.

What is a cruise control brake switch?

The cruise control brake release switch is a switch that turns off your cruise control when your brake pedal is pressed. When you decelerate your vehicle while cruise control is turned on the cruise control module detects a loss of continuity and cancels the cruise control set speed.

How do I fix code P0573?

How Is The P0573 Code Fixed?

  1. Replacing a faulty cruise control brake switch.
  2. Replacing a blown fuse.
  3. Replacing a defective brake pedal or brake light switch.
  4. Clearing dirt and debris from the cruise control brake switch assembly.
  5. Replacing or repairing a damaged harness, connectors, and so on.


What does P0571 code mean?

P0571 is a generic OBD-II diagnostic trouble code (DTC) that the engine control module (ECM) generates. The P0571 code is defined as a “cruise control / brake switch ‘ A’ circuit malfunction.”

How do you test a brake pedal position sensor?

The best way to test a brake pedal position sensor is by using a multimeter that could get the voltage running through the sensor. Simply put the multimeter on the wires and then press the pedal down while the car is turned on. If the multimeter cannot pick up a voltage, the sensor is faulty or damaged.

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How do you test a cruise control brake switch?

Since the brake pedal and cruise control share the same activation switch, one way to determine if the switch is faulty is to press the brake pedal and see if the brake lights illuminate. If they do not, the cruise control brake switch may need to be replaced.

How do you reset brake light switch?

Zitat von Youtube: So when you install that you have to reset it by pulling the arm all the way out like this then what you do is push the brake pedal down as if breaking.

How do I know if my brake light switch is bad?

What Are The Symptoms Of A Faulty Brake Light Switch?

  1. Your Brake Lights Don’t Light Up. Your brake lights are supposed to turn on when you push down on the brake pedal, giving a heads up to the driver behind you. …
  2. Brake Lights Stay On Continuously. …
  3. Bad Cruise Control. …
  4. Car Won’t Turn On. …
  5. ABS Warning Light Comes On.


Does brake switch affect transmission?

Brake light switch problems



A faulty brake light switch can cause many problems. If the switch is bad, the brake lights won’t operate and the transmission shifter will not come out of the “Park” position. In cars with a push-button start system, a faulty brake light switch can cause the vehicle not to start.

How does a brake switch work?

Your brake light switch is a simple spring-loaded switch that is held open by a tab on the brake pedal, keeping the brake lights off. When you push the pedal down, the spring causes the switch to close, completing the electrical circuit and turning on the brake lights.

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What can cause brake lights to stop working?

If one or more of your brake lights isn’t working properly, it could mean one of three things: The brake light system fuse is blown, the brake light bulbs are burned out or the brake light wiring switch is broken. All of these issues are easy to troubleshoot.

How much does it cost to fix a brake light?

Average Cost



The cost of swapping out one or both brake lights can vary widely. You can come across a wide range of prices, from $20 to $150. It will depend on your make and model and where you go to have the work done.