Brakes, ABS & Chassis Trouble Codes: List & Fixes
These codes come from the ABS, traction control, stability control, electronic parking brake, power steering and suspension systems. With an ABS fault, normal braking usually still works but the wheels can lock under hard braking – drive with extra distance. Wheel speed sensors, their wiring and damaged or dirty tone rings are frequent causes; brake hydraulics and ABS modules are shop work.
36Codes
3.1Average severity
17%High or critical
14%DIY-friendly
Severity distribution
Most viewed
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
C0020
Chassis
The ABS module saw a fault in the electric pump motor that builds brake pressure during ABS…
Moderate
C0040
Chassis
The ABS module isn't getting a usable signal from the passenger-side front wheel speed sensor.
Moderate
C0045
Chassis
The ABS module lost a valid signal from the driver-side rear wheel speed sensor.
Moderate
C0050
Chassis
The ABS module can't trust the passenger-side rear wheel speed signal and has shut ABS off.
Moderate