DT Codes . com
DTC - Diagnostic Trouble Codes information

P1051

Powertrain Codes

P1051 - INFINITI - Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

- Air Fuel Ratio Sensor 1 circuit is open or shorted - Air Fuel Ratio Sensor 1 circuit electrical connection - Faulty Air Fuel Ratio Sensor 1 Bank 2

When Detected

The current amperage in the heated air fuel ratio (A/F) sensor 1 heater circuit is out of the normal range. An excessively low voltage signal is sent to Engine Control Module (ECM) through the heated air fuel ratio (A/F) sensor 1 heater.

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.