Left Front Wheel Speed Sensor Circuit Range/Performance (GM)
The C0051 code means the vehicle's onboard diagnostic system has detected: Left Front Wheel Speed Sensor Circuit Range/Performance (GM). This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $100 - $600 (wheel-speed sensor or wiring most often; EBCM/pump work costs more)
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Basic scanners cannot read ABS codes. This one reads all four systems so you know exactly which sensor failed.
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Common Symptoms
- ABS and/or traction control warning lights on
- ABS and stability assist may be disabled (base brakes still work)
- Possible false ABS activation at low speed with a failing wheel-speed sensor
Probable Causes (Ranked by Likelihood)
- Fault in the ABS/traction control component this code names (Left Front Wheel Speed Sensor Circuit Range/Performance) High
- Damaged wiring or a corroded connector in that circuit - road-splash zones corrode connectors High
- Failed related sensor or actuator Moderate
- Control module fault Low
Common Fixes by Vehicle
What techs usually find when diagnosing C0051 on specific vehicles — tap your vehicle for the fix and the exact part:
2005-2016 GM (steering position) moderate DIY
C0051 is a steering wheel position / steering angle sensor fault. After a battery disconnect, alignment, or clockspring service it often just needs a steering angle sensor recalibration with a capable scan tool. If recalibration fails, the sensor (in the steering column clockspring assembly) is the replacement. Always recalibrate after replacing.
Labor: 1-2 hoursFrequently Asked Questions
What does C0051 mean?
C0051 is a chassis code used primarily by GM vehicles: Left Front Wheel Speed Sensor Circuit Range/Performance. It concerns the ABS/traction control system.
Can I keep driving with C0051?
Base brakes keep working, but assume ABS and stability control are offline until repaired - allow longer stopping distances and drive gently, especially in rain or snow. Repair promptly.
Is C0051 the same on every make?
The decimal C0xxx range is dominated by GM's assignments (Chevrolet, GMC, Buick, Cadillac). Other makes may use this ID differently - if your vehicle is not a GM product, verify the meaning in your make's service information.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Read the code with a GM-capable scan tool and note the symptom byte/subcode if shown.
-
View live data for the named circuit (e.g. all four wheel speeds while rolling for wheel-speed codes).
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Inspect the circuit's wiring and connectors - chassis harnesses live in the splash zone and corrode first.
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Follow the GM pinpoint test for C0051 before replacing components.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Commonly Affected Vehicles
- Chevrolet, GMC, Buick, Cadillac (GM chassis code range)
Related Codes
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