MechanicDB
Fault Family System: Chassis (C-Codes) 61 SAE Codes

Wheel Speed Sensor Circuit

Diagnostic & Technical Explanation
Code C0031 (Left Front Wheel Speed Sensor) sets when the ABS module loses a valid electrical signal from a wheel speed sensor -- the circuit reads open, shorted low or high, drops out intermittently, fails to correlate with the other three wheels, or reports an incorrect component installed. The diagnosis and repair are identical at every corner: a corroded or unplugged connector, a chafed harness conductor rubbing on the strut or subframe, or a failed Hall-effect/variable-reluctance sensor element. This is distinct from a tone-ring or mechanical fault, where the wiring and sensor test fine but the signal is noisy or absent because of physical damage at the reluctor wheel.

These 61 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 61 times.

Codes in this family (61)

CodeDefinitionRepair coverage
C0031Left Front Wheel Speed Sensor4 ranked fixes
C0032Left Front Wheel Speed Sensor Supply4 ranked fixes
C0034Right Front Wheel Speed Sensor4 ranked fixes
C0035Right Front Wheel Speed Sensor Supply4 ranked fixes
C0037Left Rear Wheel Speed Sensor4 ranked fixes
C0038Left Rear Wheel Speed Sensor Supply4 ranked fixes
C003ARight Rear Wheel Speed Sensor4 ranked fixes
C003BRight Rear Wheel Speed Sensor Supply4 ranked fixes
C003DRear Wheel Speed Sensor4 ranked fixes
C003ERear Wheel Speed Sensor Supply4 ranked fixes
C003FWheel Speed Sensors Rotation Direction Correlation4 ranked fixes
C0500Left Front Wheel Speed Sensor A Circuit/Open4 ranked fixes
C0502Left Front Wheel Speed Sensor A Circuit Low4 ranked fixes
C0503Left Front Wheel Speed Sensor A Circuit High4 ranked fixes
C0504Left Front Wheel Speed Sensor A Intermittent/Erratic4 ranked fixes
C0505Left Front Wheel Speed Sensor A Correlation4 ranked fixes
C0506Right Front Wheel Speed Sensor A Circuit/Open4 ranked fixes
C0508Right Front Wheel Speed Sensor A Circuit Low4 ranked fixes
C0509Right Front Wheel Speed Sensor A Circuit High4 ranked fixes
C050ARight Front Wheel Speed Sensor A Intermittent/Erratic4 ranked fixes
C050BRight Front Wheel Speed Sensor A Correlation4 ranked fixes
C050CLeft Rear Wheel Speed Sensor A Circuit/Open4 ranked fixes
C050ELeft Rear Wheel Speed Sensor A Circuit Low4 ranked fixes
C050FLeft Rear Wheel Speed Sensor A Circuit High4 ranked fixes
C0510Left Rear Wheel Speed Sensor A Intermittent/Erratic4 ranked fixes
C0511Left Rear Wheel Speed Sensor A Correlation4 ranked fixes
C0512Right Rear Wheel Speed Sensor A Circuit/Open4 ranked fixes
C0514Right Rear Wheel Speed Sensor A Circuit Low4 ranked fixes
C0515Right Rear Wheel Speed Sensor A Circuit High4 ranked fixes
C0516Right Rear Wheel Speed Sensor A Intermittent/Erratic4 ranked fixes
C0517Right Rear Wheel Speed Sensor A Correlation4 ranked fixes
C0555Left Front Wheel Speed Sensor A Incorrect Component Installed4 ranked fixes
C0556Right Front Wheel Speed Sensor A Incorrect Component Installed4 ranked fixes
C0557Left Rear Wheel Speed Sensor A Incorrect Component Installed4 ranked fixes
C0558Right Rear Wheel Speed Sensor A Incorrect Component Installed4 ranked fixes
C05A3Wheel Speed Sensors Supply Circuit High4 ranked fixes
C05A4Wheel Speed Sensors Supply Circuit Low4 ranked fixes
C0651Left Front Wheel Speed Sensor B Circuit/Open4 ranked fixes
C0653Left Front Wheel Speed Sensor B Circuit Low4 ranked fixes
C0654Left Front Wheel Speed Sensor B Circuit High4 ranked fixes
C0655Left Front Wheel Speed Sensor B Intermittent/Erratic4 ranked fixes
C0656Left Front Wheel Speed Sensor B Correlation4 ranked fixes
C0657Left Front Wheel Speed Sensor B Incorrect Component Installed4 ranked fixes
C0658Right Front Wheel Speed Sensor B Circuit/Open4 ranked fixes
C065ARight Front Wheel Speed Sensor B Circuit Low4 ranked fixes
C065BRight Front Wheel Speed Sensor BCircuit High4 ranked fixes
C065CRight Front Wheel Speed Sensor B Intermittent/Erratic4 ranked fixes
C065DRight Front Wheel Speed Sensor B Correlation4 ranked fixes
C065ERight Front Wheel Speed Sensor B Incorrect Component Installed4 ranked fixes
C065FLeft Rear Wheel Speed Sensor B Circuit/Open4 ranked fixes
C0661Left Rear Wheel Speed Sensor B Circuit Low4 ranked fixes
C0662Left Rear Wheel Speed Sensor B Circuit High4 ranked fixes
C0663Left Rear Wheel Speed Sensor B Intermittent/Erratic4 ranked fixes
C0664Left Rear Wheel Speed Sensor B Correlation4 ranked fixes
C0665Left Rear Wheel Speed Sensor B Incorrect Component Installed4 ranked fixes
C0666Right Rear Wheel Speed Sensor B Circuit/Open4 ranked fixes
C0668Right Rear Wheel Speed Sensor B Circuit Low4 ranked fixes
C0669Right Rear Wheel Speed Sensor B Circuit High4 ranked fixes
C066ARight Rear Wheel Speed Sensor B Intermittent/Erratic4 ranked fixes
C066BRight Rear Wheel Speed Sensor B Correlation4 ranked fixes
C066CRight Rear Wheel Speed Sensor B Incorrect Component Installed4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here: