P1031 INFINITI – Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 1

P1031 INFINITI Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1031 INFINITI Possible Causes

Faulty Air Fuel Ratio Sensor 1 Bank 1,Air Fuel Ratio Sensor 1 harness is open or shorted,Air Fuel Ratio Sensor 1 circuit poor electrical connection

P1031 INFINITI Description

The Engine Control Module (ECM) performs ON/OFF duty control of the Air Fuel Ratio (A/F) sensor 1 heater corresponding to the engine operating condition to keep the temperature of A/F sensor 1 element at the specified range.