Wheel Speed Sensor

NAME OF CODE:
Left Front Wheel Speed Sensor
Right Front Wheel Speed Sensor
Left Rear Wheel Speed Sensor
Right Rear Wheel Speed Sensor

WHEN MONITORED:
Vehicle speed is above 8 MPH, or the 2 highest wheels are above 15 MPH.

SET CONDITION:
The wheel speed sensor codes are set when the Controller, Anti-lock Brake (CAB) fails to detect a signal from one or more sensors. The missing sensor signal(s) must be missing for greater than 2.5 seconds or 20 seconds in the case of both rear wheels missing (the second case is to prevent false codes caused by excess front wheel spin such as a snowbound vehicle). The code indicates wire continuity exists, but the sensor signal is interrupted or not being generated. If a wheel speed sensor circuit continuity problem occurs, this trouble code will also exist.

POSSIBLE CAUSES:
- Wheel speed sensor loose at wheel
- Damaged wheel speed sensor
- Damaged tone wheel
- Hydroplaning at high speed
- Intermittent open sensor circuit
- Wheel lock-up during ABS stop
- Missing tone wheel
- Excess sensor gap or runout