Right Rear Wheel Speed Sensor Circuit Erratic
What does C0130 mean?
The C0130 code means the vehicle's onboard diagnostic system has detected: Right Rear Wheel Speed Sensor Circuit Erratic. This is a moderate severity code.
Common Symptoms
- ABS warning light on
- Right rear brake locking during ABS event
- Traction control engaging unexpectedly
- Stability control warning
- Rear braking feel uneven
Probable Causes (Ranked by Likelihood)
- Contaminated right rear tone ring Very High
- Cracked or damaged right rear speed sensor High
- Right rear wheel bearing play Moderate
- Sensor wiring damage from road debris Low
Step-by-Step Diagnostic Procedure
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Monitor all wheel speed sensors during test drive
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Inspect right rear tone ring for debris or damage
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Check right rear sensor physical condition
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Test right rear wheel bearing for play
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Inspect wiring along rear axle or suspension
Frequently Asked Questions
Are rear wheel speed sensors different on trucks?
On trucks with a solid rear axle, the tone ring may be on the axle shaft inside the differential or on the brake rotor. This differs from independent rear suspension vehicles where it is at the hub.
Can a rear differential service affect the tone ring?
If the tone ring is located inside the differential, improper reassembly during a differential service could damage or dislodge it, causing erratic speed readings.
How do I prevent tone ring contamination?
Regular undercarriage washing, especially after winter driving with road salt, helps prevent metallic debris buildup on the tone ring that causes erratic sensor readings.