Right Rear Wheel Speed Sensor Circuit
What it means
The ABS module has detected a fault in the signal or circuit of the right rear wheel speed sensor, such as a lost signal or an implausible value. The module usually disables ABS, traction control (TCS) and stability control, while normal braking still works.
Symptoms4
- ABS, traction control and stability lights on.
- ABS not working, so wheels lock more easily under hard braking.
- On some vehicles, an erratic speedometer or disabled cruise control.
- Problem sometimes appears after bumps, rain or brake work.
Possible causes6
- Faulty right rear wheel speed sensor.
- Sensor wiring under the vehicle damaged by stones, debris or rear suspension movement, or after rear brake work.
- Corroded sensor connector or water and dirt inside it.
- Metal debris or rust on the sensor tip weakening the signal.
- Damaged or dirty tone ring, or a damaged magnetic ring in the wheel bearing on vehicles that use one.
- Excess wheel bearing play changing the gap between sensor and ring.
How to diagnose5
- Read the ABS module codes and confirm the code is for this wheel.
- Watch all four wheel speeds on a scan tool during a slow drive; the faulty sensor reads zero or erratic compared with the others.
- Inspect the sensor wire along its path under the vehicle and its clips, and gently move the wire while watching the reading to catch an intermittent break.
- Inspect the connector for corrosion or water, and test the sensor circuit against the manufacturer specification for its type.
- Remove the sensor, inspect its tip and the tone ring for debris or cracks, and check wheel bearing play.
How to fix5
- Clean the sensor tip, its mounting bore and the tone ring.
- Repair the damaged wire or connector and secure the wire in its original clips.
- Replace the right rear wheel speed sensor if proven faulty.
- Replace the tone ring or the wheel bearing with magnetic ring if damaged.
- Clear the codes, road test and confirm the ABS light stays off and wheel speeds match.
Repair cost
In Saudi riyals; the highlighted part is the expected range for this fault.
The cost is low for a cleaning or wire repair, rises with a sensor replacement, and reaches the upper end if the wheel bearing or tone ring must be replaced.
Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026
Frequently asked questions
Why does the code appear after rain or a car wash?
Water can enter the right rear sensor connector or a split wire and break the signal until it dries. The fix is repairing the connector or wire.
Should I replace the sensor right away?
Not before testing. Many cases come from a wire, connector or debris on the sensor tip, and the sensor should be replaced only after its circuit and tone ring are confirmed good.
This guide is for information only and does not replace an inspection by a qualified technician. If the fault involves brakes, steering, engine temperature, electrics or refrigerant, do not attempt the repair yourself.
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