Diagnostic Aids

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Do not use a magnet to clean the encoder ring.
Inspect the encoder ring for rust or corrosion.
If more than one wheel speed DTC is set, diagnose each wheel speed sensor individually.
If any of the symptom byte codes 08, 18, or 0F are set, refer to the Diagnostic Fault Information table for possible mechanical faults or conditions.
If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion.