Normal Operation and Fault Conditions

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2018 Lincoln MKZ, 2018 Ford Transit-350 HD, 2018 Ford Transit-350, 2018 Ford Transit-250, and 2018 Ford Transit-150. However, it is still accessible from the selected car via links, so may be relevant.

The wheel speed sensor and encoder (tone wheel) generate a square wave signal proportional to wheel speed and sends this information to the ABS module. The wheel bearing, encoder and wheel speed sensor must be undamaged and free from contamination to produce a clean signal for use by the ABS module. Also, all 4 tires and wheels must be of the same manufacturer recommended size for the wheel speed sensor to generate an accurate wheel speed.

PPT AB ABS MODULE DTC FAULT TRIGGER CONDITIONS

DTC	Description	Fault Trigger Conditions
C0030:07	Left Front Tone Wheel: Mechanical Failure	Sets when damage to the wheel speed sensor encoder, damage to the wheel bearing, or contamination or deformation of the wheel bearing seal affects the sensor input to the ABS module.
C0033:07	Right Front Tone Wheel: Mechanical Failure	Sets when damage to the wheel speed sensor encoder, damage to the wheel bearing, or contamination or deformation of the wheel bearing seal affects the sensor input to the ABS module.
C0036:07	Left Rear Tone Wheel: Mechanical Failure	Sets when damage to the wheel speed sensor encoder, damage to the wheel bearing, or contamination or deformation of the wheel bearing seal affects the sensor input to the ABS module.
C0039:07	Right Rear Tone Wheel: Mechanical Failure	Sets when damage to the wheel speed sensor encoder, damage to the wheel bearing, or contamination or deformation of the wheel bearing seal affects the sensor input to the ABS module.
C0031:07	Left Front Wheel Speed Sensor: Mechanical Failure	Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
C0034:07	Right Front Wheel Speed Sensor: Mechanical Failure	Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
C0037:07	Left Rear Wheel Speed Sensor: Mechanical Failure	Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
C003A:07	Right Rear Wheel Speed Sensor: Mechanical Failure	Sets when the wheel speed sensor, encoder or wheel bearing is damaged; if the wheel bearing is not installed correctly; if an incorrectly sized tire is installed; if an excessive air gap exists between the wheel speed sensor and the encoder due to an incorrect component being installed and it affects the sensor input to the ABS module.
C0031:29	Left Front Wheel Speed Sensor: Signal Invalid	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder, if the wrong sensor is installed (bidirectional versus uni-directional) or if the tire size is incorrect for the vehicle and it affects the sensor input to the ABS module.
C0034:29	Right Front Wheel Speed Sensor: Signal Invalid	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder, if the wrong sensor is installed (bidirectional versus uni-directional) or if the tire size is incorrect for the vehicle and it affects the sensor input to the ABS module.
C0037:29	Left Rear Wheel Speed Sensor: Signal Invalid	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder, if the wrong sensor is installed (bidirectional versus uni-directional) or if the tire size is incorrect for the vehicle and it affects the sensor input to the ABS module.
C003A:29	Right Rear Wheel Speed Sensor: Signal Invalid	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder, if the wrong sensor is installed (bidirectional versus uni-directional) or if the tire size is incorrect for the vehicle and it affects the sensor input to the ABS module.
C0031:2F	Left Front Wheel Speed Sensor: Signal Erratic	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder or high frequency interference and it affects the sensor input to the ABS module.
C0034:2F	Right Front Wheel Speed Sensor: Signal Erratic	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder or high frequency interference and it affects the sensor input to the ABS module.
C0037:2F	Left Rear Wheel Speed Sensor: Signal Erratic	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder or high frequency interference and it affects the sensor input to the ABS module.
C003A:2F	Right Rear Wheel Speed Sensor: Signal Erratic	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder or high frequency interference and it affects the sensor input to the ABS module.
C0031:64	Left Front Wheel Speed Sensor: Signal Plausibility Failure	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder, if the wrong sensor is installed (bidirectional versus uni-directional) or if the tire size is incorrect for the vehicle affects the sensor input to the ABS module.
C0034:64	Right Front Wheel Speed Sensor: Signal Plausibility Failure	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder, if the wrong sensor is installed (bi-directional versus uni-directional) or if the tire size is incorrect for the vehicle affects the sensor input to the ABS module.
C0037:64	Left Rear Wheel Speed Sensor: Signal Plausibility Failure	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder, if the wrong sensor is installed (bidirectional versus uni-directional) or if the tire size is incorrect for the vehicle affects the sensor input to the ABS module.
C003A:64	Right Rear Wheel Speed Sensor: Signal Plausibility Failure	Sets when the wheel speed sensor is damaged, if the encoder is missing or damaged, if there is an excessive gap between the sensor and encoder, if the wrong sensor is installed (bidirectional versus uni-directional) or if the tire size is incorrect for the vehicle affects the sensor input to the ABS module.