Possible causes

– ABS Wheel Sensor not installed currently
– ABS Wheel Sensor rotor or encoder damaged
– Faulty ABS Wheel Sensor
– ABS Wheel Sensor harness is open or shorted
– ABS Wheel Sensor circuit poor electrical connection
– Faulty ABS Control Unit

Tech notes

There is a factory service bulletin for the all Nissan models to help diagnose the C1103 code:

2007-2013 All Nissan Models:
2007-2013 All Nissan Models Factory Service Bulletin OBDII Code C1103

When is the code detected?

Circuit of front Right wheel sensor is open, shorted or sensor voltage is unusual

Symptoms

– ABS Warning Light ON

C1103 NISSAN Description

When the sensor rotor rotates, the magnetic field changes. It converts the magnetic field changes to current signals (rectangular wave) and transmits them to the ABS actuator and electric unit (control unit).