Right Front Wheel Speed Sensor Circuit
What it means
The ABS module has detected a fault in the signal or circuit of the right front 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 front wheel speed sensor.
- Sensor wiring damaged by rubbing or stretching with steering and suspension movement, or after brake or shock absorber 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 by the strut and suspension arm, and turn the steering lock to lock 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 front 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 did the code appear after replacing the front shocks?
The right front sensor wire runs near the strut and can be stretched, pinched or left out of its clips during the job, so inspection starts with the wire routing.
Is cleaning the sensor enough?
Sometimes, if metal debris or rust on the tip weakened the signal. If the code returns after cleaning, the wire, sensor and tone ring must be checked.
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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