Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Checking The Signal
Check whether any diagnostic trouble codes (DTCs) are stored in the brake control module (BCM) or in the central electronic module (CEM). If diagnostic trouble codes (DTCs) are stored in the brake control module (BCM) or in the central electronic module (CEM), these shall be taken care of first.
If there are any other diagnostic trouble codes (DTCs) stored for the brake pedal position sensor or for the stop lamp switch, fault-trace these first.
HINT: If diagnostic trouble code ECM-941C is stored in the engine control module (ECM), the brake pedal switch probably is or has been damaged.
Check the signals from the brake pedal switch and the brake pedal sensor during vehicle communication for the engine control module. The switch should be closed and the brake pedal sensor value should be updated when the brake pedal is depressed.
Check the cables for short-circuit to voltage, short-circuit to ground and open circuit.
Remedy as necessary.
Other information
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.