C1145 – Right Front Wheel Speed Sensor Input Circuit Failure


The right front wheel speed, as given by the wheel’s speed sensor is not within the expected range.

Main Symptoms:

One of the C1145 code's symptoms is the Check Engine Light
The Check Engine Light coming on might be an indicator of the C1145 trouble code

Possible Causes:

  • Defective right front wheel speed sensor
  • Wiring problem in that speed sensor’s circuit
  • PCM is not configured properly for the size of the right front wheel

Diagnostic Steps:

  • Visually inspect all wiring to the right front wheel speed sensor and check for open, short, broken and chaffed wires
  • Check the voltage of the speed sensor and match with manufacturer specs. If they don’t match replace the sensor

Read More: OBD2 Codes List: Meaning, Fixes, and Free Download