C003E: Rear Wheel Speed Sensor Supply (Subfault)

What it means

This code identifies a fault associated with the rear wheel speed sensor supply. The specific failure depends on the diagnostic subtype.

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 provides and monitors a supply circuit for the rear wheel-speed sensor. This subfault code identifies a problem in that feed, while the diagnostic subtype is needed to tell whether the issue is an open, short, or another supply condition.

Common causes

Most likely first.

1. Open or short in sensor supply wiring
2. Blown fuse or lost power supply
3. Loose or corroded connector
4. ABS module supply fault

Symptoms

• ABS or stability-control warning light
• ABS or stability control may be limited or disabled

How to diagnose it

1. Read ABS-module codes and freeze-frame data to check when the rear sensor supply fault occurred and whether other supply faults were stored.
2. Inspect the rear sensor connector and harness for corrosion, loose terminals, cuts, or rubbing against nearby parts.
3. Check the relevant fuse and shared supply connections using the vehicle wiring diagram.
4. Test the identified rear sensor supply and ground for continuity and shorts according to the manufacturer's procedure.
5. If the external circuit checks out, verify the ABS module's power, ground, connector pins, and supply output before considering module failure.

Common fixes

• Reconnect or clean the rear sensor supply connector.
• Repair an open, short, or damaged section of rear sensor wiring.
• Replace a failed fuse after correcting the cause.
• Repair a poor ABS module power or ground connection.
• Replace or repair the ABS module only after its supply fault is confirmed.

Can I keep driving?

ABS or stability control may be limited or disabled, and the vehicle may enter a reduced-function mode. Use caution, avoid hard braking and slippery conditions, and arrange prompt diagnosis because normal braking may not include electronic assistance.