What it means
This code identifies a subfault associated with the right-rear 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-rear wheel-speed sensor reads the right-rear tone wheel and reports wheel rotation to the ABS module. This base code identifies a right-rear sensor-related subfault but does not define the failure mode, so subtype data and circuit checks are needed to distinguish sensor, wiring, and signal problems.
Common causes
Most likely first.
- Wheel speed sensor failure
- Damaged or corroded sensor wiring
- Loose or contaminated connector
- Excessive sensor air gap
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 note the right-rear wheel-speed value in freeze-frame data.
- Compare live right-rear speed with the other wheels during slow rotation and look for dropouts or an implausible reading.
- Inspect the right-rear sensor, connector, and harness for looseness, corrosion, contamination, damage, or chafing.
- Inspect the right-rear tone wheel or encoder and verify the sensor is seated with the appropriate gap.
- Test the right-rear sensor and signal wiring for opens, shorts, or intermittent faults using the manufacturer's procedure.
- If the sensor and circuit test correctly, check the tone-wheel signal and ABS-module input before replacing components.
Common fixes
- Clean and secure the right-rear sensor connector.
- Repair damaged, chafed, or corroded right-rear sensor wiring.
- Correct sensor seating or clear debris from the right-rear sensing gap.
- Replace the right-rear wheel-speed sensor if tests confirm failure.
- Repair or replace a damaged right-rear tone wheel or encoder.
Can I keep driving?
The ABS or stability-control system may be limited, even if basic braking remains available. Drive carefully, allow extra stopping distance, and avoid slippery or high-speed driving until the right-rear signal fault is fixed.
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.