OBDII Code List

C1299 MERCURY - Wheel Speed Left Rear Signal Fault

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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Possible causes

  • Wheel Speed Sensor Ring
  • Faulty Wheel Speed Sensor
  • Wheel Speed Sensor harness is open or shorted
  • Wheel Speed Sensor circuit poor electrical connection
  • Faulty Anti-Lock Brake System (ABS) Module

Tech notes

Incorrect tire size or tire pressure can set these DTCs as well. DTCs set in the ignition cycle can only be cleared by cycling the ignition off and on once the fault has been corrected.

Possible symptoms

  • Anti-Lock Brake System (ABS) Warning Light ON
  • Engine Light ON (or Service Engine Soon Warning Light)

C1299 Mercury Description

The wheel speed sensor and sensor ring generate a square wave signal to the Anti-Lock Brake System (ABS) Module that is proportional to wheel speed. The ABS module compares wheel speed inputs from all wheel speed sensors to determine an impending wheel lockup. The ABS Module monitors the Wheel Speed Sensor. The ABS Module sets the OBDII code when the Wheel Speed Sensor is not to factory specifications.
OBDII Code C1299 Mercury - Wheel Speed Left Rear Signal Fault -

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