Brake Pedal Signal Malfunction
Fault in the brake pedal switch signal.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The brake pedal switch is not sending the correct signal to the computer, usually indicating whether the brake is applied or not. This switch signals the system when to activate brakes or other systems, affecting things like traction control.
What the computer is actually seeing
The brake control module sees either no signal or an inconsistent signal from the brake pedal switch, which should typically be a low signal (close to 0 volts) when the pedal is not pressed and a high signal (close to battery voltage) when pressed.
What a healthy reading looks like
Signal voltage should be less than 0.5 volts when the brake is not pressed; it should be over 9 volts when pressed.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Check the brake fluid level; low fluid can affect brake operation. Decision: If low, fill to correct level; recheck code and symptoms.
- 2Inspect the wiring and connector at the brake pedal switch. Look for signs of wear or damage. Decision: If damaged, repair or replace the wiring/connector; recheck code.
- 3Test the voltage at the brake pedal switch while pressing and releasing the pedal. Expected values: below 0.5V when released; above 9V when pressed. Decision: If correct, suspect a fault in the brake control module; if incorrect, replace the brake pedal switch.
Common causes
- Faulty brake pedal switch
- Wiring issues (frayed or broken wire)
- Corroded or loose connectors
- Faulty brake control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; if traction control or ABS is disabled, be cautious, but you can drive until fixed.
Will this code come back after clearing?
If the underlying issue is not resolved, it will likely come back.
Does this code affect other systems?
Yes, it can impact ABS and traction control functions.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →