What it means
This code identifies a subfault associated with the supply to the right-rear wheel-speed sensor. The base code alone does not establish the specific supply-circuit failure.
How it works
The ABS module supplies and monitors the electrical feed for the right-rear wheel-speed sensor. This code flags a subfault in that supply path, but the base code does not say whether the feed is open, shorted, or lost upstream.
Common causes
Most likely first.
- Open or short in sensor supply wiring
- Blown fuse or lost power supply
- Loose or corroded connector
- ABS module supply fault
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
How to diagnose it
- Read ABS-module codes and freeze-frame data to see when the right-rear sensor supply fault was recorded and whether related power codes are present.
- Inspect the right-rear sensor connector and harness for looseness, corrosion, chafing, or damage near the wheel and suspension.
- Check the relevant fuse and supply connections against the vehicle wiring diagram, since a lost shared feed can affect more than one sensor.
- With the circuit identified from service information, test the right-rear sensor supply and ground for continuity and shorts while moving the harness gently.
- If wiring, fuse, and connector checks pass, verify the ABS module's supply output and connector terminals before suspecting an internal module fault.
Common fixes
- Reconnect and clean the right-rear sensor connector.
- Repair damaged or corroded right-rear sensor supply wiring.
- Replace a failed fuse after finding and correcting the cause of the fuse failure.
- Repair an ABS module power or ground connection.
- Replace or repair the ABS module only if its supply output is confirmed faulty.
Can I keep driving?
Normal braking may remain, but ABS and stability control can be unavailable, and brake assist behavior may be affected. Drive cautiously, leave extra stopping distance, and avoid slippery roads until the supply fault is repaired.
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.