C0050 on Chevrolet
Right Rear Wheel Speed Sensor Circuit
C0050 on Chevrolet vehicles indicates right rear wheel speed sensor circuit. Au7o has documented this code across 3 Chevrolet models — most commonly on Avalanche, Colorado, Express. This is a brake/ABS-system code. The right rear wheel speed sensor reports how fast that wheel spins so the anti-lock brake, traction control, and stability systems can do their job. C0050 means the ABS module detected an electrical fault in the right rear wheel speed sensor circuit — an open, short, or an erratic/out-of-range signal. This usually turns on the ABS and traction/stability warning lights and may disable those features, though standard braking remains available. Typical repair costs on Chevrolet range from $100 to $1,200, depending on the specific model and root cause.
Common Causes of C0050
- •Failed right rear wheel speed sensor
- •Damaged, corroded or disconnected sensor wiring/connector
- •Damaged or rusty tone/reluctor ring (missing or clogged teeth)
- •Excessive air gap between sensor and tone ring
- •Wheel bearing wear affecting an integrated sensor
- •Moisture or corrosion in the connector
- •Faulty ABS control module (less common)
C0050 on Chevrolet by Model
Chevrolet Avalanche(1 issue)
- Unwanted ABS Activation Increasing Stopping Distance2002-2006
First-generation Avalanches (2002-2006) can experience unwanted ABS activation during normal low-speed braking. The antilock brake system activates inappropriately, causing a pulsating brake pedal and increased stopping distances when it should not be engaging. The issue is more likely in environmentally corrosive areas where road salt deteriorates the ABS wheel speed sensor wiring and tone rings. This creates a safety hazard as the vehicle takes longer to stop than expected during routine braking.
Chevrolet Colorado(1 issue)
- ABS Module / Wheel Speed Sensor Faults Causing ABS Warning and Intermittent Brake Activation2004-2012
Colorado owners frequently report ABS warning lights, stored wheel speed sensor faults, and low-speed unwanted ABS activation, especially in rust-belt trucks. Corrosion at the front hub sensor mounting area or failing hub-integrated wheel speed sensors can create an erratic signal that the ABS module interprets as wheel slip. This issue is widely documented across GM midsize trucks and often shows up as pulsation or extended stopping distance at parking-lot speeds.
Chevrolet Express(1 issue)
- StabiliTrak and ABS False Activation from Wheel Speed Sensors2008-2025
The wheel speed sensors and their wiring are prone to failure due to the harsh commercial-use environment, causing the StabiliTrak and ABS systems to falsely activate during normal driving. The ABS unexpectedly engages during normal braking, extending stopping distances. The tone rings on the hub bearings also corrode.
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View C0050 across all makes →Frequently Asked Questions
What does C0050 mean on Chevrolet?▼
C0050 stands for "Right Rear Wheel Speed Sensor Circuit." This is a brake/ABS-system code. The right rear wheel speed sensor reports how fast that wheel spins so the anti-lock brake, traction control, and stability systems can do their job. C0050 means the ABS module detected an electrical fault in the right rear wheel speed sensor circuit — an open, short, or an erratic/out-of-range signal. This usually turns on the ABS and traction/stability warning lights and may disable those features, though standard braking remains available. On Chevrolet specifically, this code is documented across 3 models.
What causes C0050 on Chevrolet vehicles?▼
Common causes on Chevrolet: Failed right rear wheel speed sensor, Damaged, corroded or disconnected sensor wiring/connector, Damaged or rusty tone/reluctor ring (missing or clogged teeth), Excessive air gap between sensor and tone ring, Wheel bearing wear affecting an integrated sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix C0050 on a Chevrolet?▼
Repair costs on Chevrolet range from $100 to $1,200, depending on the specific model and root cause.
Which Chevrolet models have C0050 documented?▼
Au7o has documented C0050 on 3 Chevrolet models: Avalanche, Colorado, Express.