C0040

Brake Pedal Switch A

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$22–56 (est.)

Symptoms

Incorrect operation of ABS or ESP
Disabling cruise control
Check Engine Light Is On
Problems starting the engine (in some models)

Causes

Brake pedal sensor malfunction
Open or short circuit in wiring harness
Oxidation of contacts
Incorrect sensor adjustment

How to Fix

Check the condition of the brake pedal sensor
Inspect the wiring harness for damage
Clean contacts from oxidation
Check sensor adjustment
Replace sensor if necessary

Related codes

C0041 C0042 C0043