Faulty brake pedal position sensor (worn internal contacts or damaged potentiometer); Damaged or misadjusted sensor wiring harness or connector at the brake pedal; Blown fuse or corroded ground connection for the sensor circuit; Brake pedal binding or incorrect pedal free play affecting sensor travel; Failed ABS control module (internal fault in the signal processing circuit); Aftermarket or incorrect brake pedal components installed, causing sensor misalignment

DTC codes / C02xx · Brakes, steering and suspension / C0202

C0202Brake Pedal Position Sensor

Q: What does code C0202 mean?

Brake Pedal Position Sensor. C0202 indicates that the anti-lock brake system (ABS) control module has detected an implausible or missing signal from the brake pedal position sensor, which it uses to determine when the driver is applying the brakes. The computer sets this code when the sensor's voltage or data does not match expected values during key-on or driving conditions, often disabling ABS and traction control as a precaution.

C0202 indicates that the anti-lock brake system (ABS) control module has detected an implausible or missing signal from the brake pedal position sensor, which it uses to determine when the driver is applying the brakes. The computer sets this code when the sensor's voltage or data does not match expected values during key-on or driving conditions, often disabling ABS and traction control as a precaution.

SystemChassis

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaBrakes, steering and suspension

Symptoms you may notice

ABS warning light illuminated on the dashboard
Traction control or stability control warning light also on
Brake pedal feels normal in most cases, with no change in braking performance
Often no symptoms besides the warning light
Cruise control may become inoperative or disengage unexpectedly
In some vehicles, the transmission may shift harshly or hesitate when coming to a stop

Common causes, most likely first

Faulty brake pedal position sensor (worn internal contacts or damaged potentiometer)
Damaged or misadjusted sensor wiring harness or connector at the brake pedal
Blown fuse or corroded ground connection for the sensor circuit
Brake pedal binding or incorrect pedal free play affecting sensor travel
Failed ABS control module (internal fault in the signal processing circuit)
Aftermarket or incorrect brake pedal components installed, causing sensor misalignment

How to diagnose and fix it

Connect a scan tool and read all ABS codes to confirm C0202 is current and not history
Visually inspect the brake pedal position sensor and its connector for damage, corrosion, or loose pins
Check the sensor's reference voltage and ground at the connector with a multimeter, comparing to manufacturer specifications
Perform a live data check of the brake pedal position sensor while slowly pressing and releasing the pedal, looking for smooth voltage changes without dropouts
Verify brake pedal free play and adjustment, and confirm the sensor is properly mounted and not loose
If the sensor signal is erratic or out of range, replace the brake pedal position sensor and clear the code
If the sensor and wiring test good, diagnose the ABS control module and its programming, repairing or replacing as needed

Why the brake pedal sensor code misleads

A brake pedal position sensor that tests fine on a static multimeter check can still fail intermittently due to worn internal contacts that only act up with heat or vibration, so a live data road test is essential.
Many technicians replace the ABS module prematurely when the real problem is a simple misadjusted brake pedal stop or a missing pedal return spring that keeps the sensor slightly off its rest voltage.
C0202 can be set by a low battery or charging system fault that causes a momentary voltage drop during cranking, so always check battery health and ground connections before condemning the sensor.
On some vehicles, the brake pedal position sensor shares a reference voltage with the accelerator pedal sensor, and a fault in that shared circuit can set C0202 alongside throttle-related codes.
The code does not always mean the sensor is dead; it can be triggered by a brake light switch that is out of adjustment, because the ABS module cross-checks the two signals for plausibility.

Can I keep driving with C0202?

The vehicle remains safe to drive under normal braking because the base hydraulic system is unaffected, but ABS and traction control are disabled, so avoid hard braking or slippery conditions until the fault is repaired. Do not tow a trailer or drive aggressively, as loss of ABS can increase stopping distance in an emergency.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.