Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 1
Table of contents
- Possible Causes
- How To Fix
- Tech Notes
- Cost To Diagnose
- When is the code detected
- Possible Symptoms
- Description
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
How do I fix code P1031 INFINITI?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- There is a Factory Service Bulletin for the following Infiniti models:
- 2004-2005 Infiniti FX35 2WD
- 2004-2005 Infiniti FX35 4WD
- 2004-2005 Infiniti G35 Sedan 2WD
- 2004-2005 Infiniti G35 Sedan 4WD
- Infiniti Factory Service Bulletin OBDII Code P1031
- The bulletin suggests reprogramming the Engine Control Module (ECM) first before replacing any parts.
Cost of diagnosing the P1031 INFINITI code
The cost of diagnosing the P1031 INFINITI code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code 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.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
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.