What it means
This code identifies a subfault associated with the right-front wheel-speed sensor. The base code does not specify the electrical or signal failure; consult the failure subtype and vehicle diagnostics.
How it works
The right-front wheel-speed sensor reads rotation from the right-front tone wheel and reports it to the ABS module. This base code identifies a right-front sensor-related subfault but does not specify the electrical or signal failure; the diagnostic subtype is needed to distinguish a sensor fault from wiring or tone-wheel trouble.
Common causes
Most likely first.
- Sensor internally failed
- Wiring open at suspension flex
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
How to diagnose it
- Read the full ABS code and subtype, then review freeze-frame data for the right-front wheel-speed signal when the fault appeared.
- Use live data to compare right-front speed with the other wheels while rotating the wheel slowly and watch for dropouts.
- Inspect the right-front sensor and connector for impact damage, corrosion, looseness, or contamination.
- Flex and inspect the right-front harness along its suspension movement path for a broken conductor or chafing.
- Inspect the right-front tone wheel or encoder and verify sensor seating and gap.
- Test the sensor and signal circuit with the manufacturer's procedure, including an intermittent check if the fault changes with suspension movement.
Common fixes
- Clean and reseat the right-front sensor connector.
- Repair a broken or chafed right-front harness section, especially at a flex point.
- Correct sensor mounting or clear debris affecting the right-front sensor gap.
- Replace the right-front wheel-speed sensor if testing confirms internal failure.
- Repair or replace a damaged right-front tone wheel or encoder if its signal is defective.
Can I keep driving?
ABS and stability control may be disabled or reduced, and some vehicles may also report reduced brake assist or erratic speed readings. Use caution, leave extra stopping distance, and avoid high-speed or slippery driving until diagnosed.
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.