C0060

Code

Generic C — Chassis

ABS Wheel Speed Sensor Circuit Fault — Left Rear

Brand: Generic

Type: C — Chassis

Views: UK: 17 EN: 56 RU: 19

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Causes

Damaged or failed left-rear wheel speed sensor (passive or active type)
Open, short or high-resistance wiring between sensor and ABS module
Corroded, loose or damaged electrical connector at sensor or ABS module
Damaged or missing tone ring/reluctor or excessive air gap
Contamination or metal debris between sensor and tone ring
Wheel bearing or hub damage causing sensor misalignment

Symptoms

ABS warning lamp ON
Traction/stability control warning lamp may illuminate or function be disabled
Possible ABS pump/motor activation faults under braking
Brake pedal feel usually unchanged (mechanical braking unaffected)
Speedometer usually unaffected for most systems but wheel speed data may be inconsistent on scanner
Intermittent faults may occur only when turning, driving over bumps, or at certain speeds

What to check

Read and record freeze-frame data and live wheel speed sensor values with a diagnostic scanner
Perform a visual inspection of the left-rear sensor, tone ring, and wiring harness for damage, corrosion, or looseness
Check connector for water ingress, bent pins or corrosion; unplug and inspect pins
Wiggle harness and connector while watching live data / check for intermittent changes
Compare left-rear wheel speed signal to other wheels with vehicle raised and wheels spun
Check for damaged/missing tone ring teeth, heavy rust or metal debris on reluctor ring

Signal parameters

Passive (variable reluctance) sensor: DC resistance typically ~500–2,000 ohms (varies by manufacturer) and generates AC voltage when wheel turns (tens mV to several volts depending on speed)
Active (3‑wire/Hall-effect) sensor: reference supply usually ~5 V (some 12 V systems exist), ground, and signal output is a square/pulsed waveform 0–5 V (or 0.1–4.9 V) with frequency proportional to wheel speed
Typical signal frequency: low Hz at low speed increasing to hundreds of Hz at highway speed (compare to other wheels)
Expected connector pin conditions: reference voltage present (if active), good ground continuity, low resistance (

Diagnostic algorithm

Verify vehicle safety: park on level surface, chock wheels, use jack stands if lifting vehicle. Follow manufacturer safety procedures.
Connect a diagnostic scanner and confirm C0060 and any related codes; record live wheel speed sensor data for all four wheels at idle and while rolling the wheel by hand.
Perform visual inspection of left-rear sensor, tone ring/reluctor and harness for damage, contamination, loose mounting, or missing tone ring teeth.
Unplug left-rear sensor connector; inspect pins for corrosion, bent/broken pins and confirm secure mating.
Measure sensor resistance (for passive sensors) and compare to specification or to another wheel sensor. Open or infinite resistance indicates an open coil.
With wheels off the ground, spin the left rear wheel and observe sensor output with oscilloscope or scan tool: passive sensor should produce an AC sine/alternating waveform whose amplitude increases with speed; active sensor should produce a pulsed square wave 0–5 V. If no or abnormal signal, suspect sensor or reluctor issue.
Check for short to power or ground: with ignition on measure voltage at signal pin (active sensor) and check for short to battery or ground.
If intermittent, perform a wiggle test on wiring harness while monitoring live data to reproduce the fault; inspect wiring where it flexes (suspension joints).
Inspect tone ring for missing/bent teeth, heavy corrosion or contact with sensor; correct gap if out of spec or replace ring/sensor as required.
If wiring and sensor check good, verify continuity between sensor connector and ABS module pins; check module connector for corrosion or loose pins.
If all wiring and sensor tested good but fault persists, consider ABS control module input circuit fault—verify with wiring diagrams and consult factory procedures before module replacement.
After repairs, clear codes and perform a road test; re-scan to confirm no recurrence and verify proper wheel speed readings and ABS operation.