DTC C1237/37 Speed Sensor Rotor Faulty: Description

This code is output when a difference in tire size, foreign matter attached to a speed sensor tip or a sensor rotor, or a missing rotor serration is detected.

This code may be output when a malfunction in the terminal of the speed sensor circuit connector or wire harness is detected.

DTC DETECTING CONDITION CHART

DTC No.	DTC Detecting Condition	Trouble Area
C1237/37	When any of the following (1 to 3) is detected: Wheel speed difference between the wheels. Wheel sensor signal failure. Continuous ABS control for 60 sec. or more.	Brake actuator assembly (skid control ECU) Speed sensor rotor (Front) Rear axle hub & bearing assembly Speed sensor Speed sensor circuit Tire & wheel size Tire deformation