ABS / traction light on: Codes, Causes & Fixes
When the ABS or traction control light is on, the anti-lock and stability functions are usually disabled while normal braking still works – so allow extra stopping distance, especially on wet or icy roads. The most frequent causes are a wheel speed sensor, its wiring or a dirty or cracked tone ring, followed by low brake fluid and ABS module faults. If the red brake warning light is on as well, or the pedal feels soft, stop driving and have the brakes checked.
65Codes
3.0Average severity
12%High or critical
15%DIY-friendly
Severity distribution
Most viewed
P0500
Powertrain
The engine computer lost its vehicle speed signal – speedometer, shifting and cruise control…
Moderate
C0035
Chassis
The ABS module lost a valid signal from the driver-side front wheel speed sensor.
Moderate
C0021
Chassis
The brake module thinks the power brake booster isn't giving the assist it should. Check pedal…
High
P0562
Powertrain
The engine computer sees too little supply voltage – usually a charging, battery or ground…
Moderate
C0561
Chassis
GM's brake or chassis module switched off stability/traction control because of a fault…
Low
C0161
Chassis
The GM brake module gets a brake-light switch signal that doesn't make sense. Check your brake…
Moderate
All codes (65)
U0416
Network
Stability-control data (steering angle, yaw rate) failed a plausibility check in another module.
Moderate
U0418
Network
Brake-control data such as pedal position or brake-assist status looks implausible to another…
High
U0420
Network
The electric power steering module is talking, but its steering angle or torque data doesn't…
Moderate
U1000
Nissan · Network
A Nissan control module couldn't send or receive CAN messages for about 2 seconds or longer.
Moderate
U1900
Ford · Network
A Ford module stopped receiving messages it expects from another module on the CAN network.
Moderate