What it means
The module detects a right-front wheel-speed sensor signal below the expected range. This indicates an electrical signal fault; the code alone does not establish that other vehicle functions are disabled.
At a glance
- Usually lights the ABS or stability-control warning light
- The engine or gearbox may go into limp mode
How it works
The ABS module monitors the electrical signal from the right-front wheel-speed sensor as it reports wheel rotation. This code sets when that signal is lower than the module's expected range, which can result from a signal wire shorted to ground or a sensor fault.
Common causes
Most likely first.
- Signal wire shorted to ground
- Damaged wiring or connector
- Faulty wheel-speed sensor
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
How to diagnose it
- Check freeze-frame data and live wheel-speed readings to confirm whether the right-front signal is low or absent compared with the other wheels.
- Inspect the right-front sensor connector and wiring for crushed insulation, corrosion, loose terminals, or contact with ground.
- Check the right-front sensor mounting and tone ring or encoder for damage or debris that could affect the reading.
- Measure the right-front sensor circuit for an unintended short to ground and check for opens or poor connections.
- Test the right-front sensor and circuit against the manufacturer's specification before replacing parts.
Common fixes
- Clean and secure the right-front sensor connector.
- Repair wiring shorted to ground or damaged insulation in the right-front circuit.
- Replace damaged right-front connector terminals.
- Replace a faulty right-front wheel-speed sensor.
- Repair a damaged right-front tone ring or encoder if inspection confirms it is affecting the signal.
Can I keep driving?
Normal braking may remain, but ABS and stability control may be unavailable and brake assist may be reduced. Allow more stopping distance and drive cautiously, especially on wet or loose surfaces.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.