P118B – Bank 4 Probe 2 Voltage Too Low Leakage Air

P118B Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P118B Possible Causes

Exhaust leaks,Faulty Oxygen Sensor,Oxygen Sensor harness is open or shorted,Oxygen Sensor circuit poor electrical connection

P118B Description

The Engine Control Module (ECM) monitors the Oxygen Sensor. The ECM sets the OBDII code when the Oxygen Sensor is not to factory specifications.