C0055: How to Diagnose & Fix — Rear Wheel Speed Sensor Circuit
2 vehicles · 2 makes · $150-$900 repair
How to diagnose and fix C0055: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
GMC Sierra 1500 · 1999–2013
Front wheel hub bearing assemblies on Sierra 1500 trucks commonly wear out, especially on 4WD models and trucks used with larger tires or in rough conditions. Owners report humming or growling that changes with speed, looseness in the front wheel, and in some cases ABS warnings or low-speed ABS activation because the wheel speed sensor is integrated into the hub. This is a frequent repair item across both GMT800 and GMT900 generations.
Common Symptoms
- humming or growling from front end
- noise increases with vehicle speed
- wheel play or looseness
- ABS light on
- traction control warning
- low-speed ABS activation
How to Fix
Diagnosis involves checking for wheel play with the tire off the ground, listening for bearing noise during road tests, and comparing wheel speed sensor data if ABS symptoms are present. Repair is replacement of the affected hub assembly, and many owners replace both sides if mileage is high. Corrosion at the sensor mounting surfaces and wiring damage should also be addressed to prevent repeat ABS issues.
Sources for this issue (1)
Jeep Wrangler · 2007–2025
Front (and sometimes rear) sealed wheel hub/bearing assemblies are a high-wear item on JK and JL Wranglers, especially on lifted rigs running larger tires that load the bearing harder. As the bearing wears it produces a speed-dependent grinding, rumbling, or humming that changes when turning, and free play can be felt by rocking the tire at the 12-and-6 positions. Because the ABS wheel-speed sensor (tone ring/sensor) is integrated into the hub assembly on these models, a failing hub commonly damages the sensor and triggers ABS and traction-control (ESC) warning lights along with disabled stability control. The common service hub assembly for 2007-2016 5-lug JK with ABS is part 513272 (Mopar/MOOG/Timken/Spicer equivalents); note a JK hub part-number change around 2011, so the correct year-specific part must be used.
Common Symptoms
- Grinding/humming that rises with speed
- Noise changes when turning
- Play when rocking tire top/bottom
- ABS warning light
- Traction control / ESC light
- Vibration in steering wheel
How to Fix
Confirm the bad corner by road-test noise direction and the 12/6 rock test for play. Replace the complete hub/bearing assembly (the integrated ABS sensor is part of the unit). For 2007-2016 5-lug JK with ABS the common service part is assembly 513272 (Mopar/MOOG/Timken/Spicer equivalents); verify the correct part for your year due to the ~2011 design change. Inspect/clean the ABS connector and clear codes; the ABS/ESC lights should extinguish once the hub and its sensor are replaced.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mopar 52060398AC front hub and bearingOEMMopar 52060398AC
Replace a confirmed failed early-JK front unit bearing Fitment/availability: 2007-2010 Wrangler JK/Unlimited, front left or right.
- Genuine Mopar 52060398AE front hub and bearingOEMMopar 52060398AE
Replace a confirmed failed revised-JK front unit bearing Fitment/availability: 2011-2018 Wrangler JK/Unlimited, front left or right; 2018 must be JK.
- Genuine Mopar 68272624AC front hub and bearingOEMMopar 68272624AC
Replace a confirmed failed JL front unit bearing Fitment/availability: 2018-2025 Wrangler JL front left or right within the issue range; 2018 must be JL, not JK. Preserve/test the separately serviced wheel-speed sensor and confirm VIN/ax…
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Sources for this issue (2)
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C0055 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does C0055 mean?
C0055 stands for "Rear Wheel Speed Sensor Circuit." This chassis code means the ABS/control module detected a problem with the rear wheel-speed sensor signal circuit. Wheel-speed sensors tell the module how fast each wheel is turning so it can manage anti-lock braking, traction, and stability control; on many GM trucks and SUVs this code points to a single rear/output speed sensor at the transmission or transfer case. A lost or erratic signal typically disables ABS and traction control (warning lights on), affecting braking safety, so it should be addressed promptly.
What are the most common causes of C0055?
The most common causes of C0055 are: Faulty rear/vehicle speed sensor, Damaged, corroded, or open sensor wiring and connector, Debris or damage on the reluctor/tone ring, Excessive air gap or sensor mounting issue, Poor ground or shorted circuit, Faulty ABS/EBCM module (less common). The specific cause varies by vehicle.
How much does it cost to fix C0055?
Repair costs for C0055 range from $150 to $900, depending on the vehicle and root cause.
Which vehicles are affected by C0055?
Au7o has documented C0055 across 2 vehicle models from 2 manufacturers: GMC, Jeep.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.