Rear Wheel Speed Sensor Circuit Intermittent
Intermittent signal issue from the rear wheel speed sensor.
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What it means (plain English)
The computer monitors the speed of each wheel. If the speed sensor on one of the rear wheels fails to send a signal or sends an unstable signal, it triggers this code.
What the computer is actually seeing
The ABS control module expects a consistent voltage signal from the rear wheel speed sensor, typically around 0-5 volts depending on wheel speed. If it sees erratic signals or a complete drop in voltage, it stores this code.
What a healthy reading looks like
Rear wheel speed should correlate with vehicle speed; common expected values are 0 volts at rest, increasing to around 2-5 volts as speed increases.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Inspect the wiring and connector at the rear wheel speed sensor for damage or corrosion. Repair as needed.
- 2Using a multimeter, measure the voltage at the rear wheel speed sensor connector while the vehicle is in motion. It should vary between 0-5 volts. If not, note the readings.
- 3Check for continuity in the wire harness between the sensor and the ABS module. Any breaks or shorts will need to be fixed.
- 4If all wiring checks out but the code persists, replace the rear wheel speed sensor and clear the code.
Common causes
- Wiring issues (frayed or damaged wires)
- Corroded connectors
- Faulty rear wheel speed sensor
- Issues with the ABS control module
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive the vehicle with this code?
Yes, but be aware that you may have reduced traction control and ABS functionality.
Will this issue come back after clearing the code?
It might if the underlying cause is not resolved, such as a faulty sensor or damaged wiring.
Why does this code sometimes pair with other codes?
The ABS system relies on multiple speed sensors; issues in one can affect others or indicate a more significant problem with wheel speed monitoring.
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