Air Fuel Ratio Sensor 1 Heater Control Circuit Low Bank 2
Table of contents
P1051 NISSAN Possible Causes
- Faulty Air Fuel Ratio Sensor 1 Bank 2
- Air Fuel Ratio Sensor 1 Bank 2 harness is open or shorted
- Air Fuel Ratio Sensor 1 Bank 2 circuit poor electrical connection
How do I fix code P1051 NISSAN?
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 are Factory Service Bulletins for the following models:
- 2005 Nissan Altima
- 2006 Nissan Altima
- 2005-2006 Nissan Altima Factory Service Bulletin P1051 OBDII Code
- 2004 Nissan Maxima w/ 5 Speed Automatic Transmission
- 2004 Nissan Quest w/ 5 Speed Automatic Transmission
- 2004 Nissan Maxima, Quest Factory Service Bulletin P1051 OBDII Code
- 2004 Nissan Maxima w/ Manual Transmission or 4 Speed Automatic Transmission
- 2004 Nissan Quest w/ 4 Speed Automatic Transmission
- 2004 Nissan Maxima, Quest Factory Service Bulletin P1051 OBDII Code
- 2004 Nissan Armada
- 2004 Nissan Titan
- 2004 Nissan Armada/Titan Factory Service Bulletin OBDII Code P1051
Cost of diagnosing the P1051 NISSAN code
The cost of diagnosing the P1051 NISSAN 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.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1051 NISSAN 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. The Diagnostic Trouble Code (DTC) will set when 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 the Engine Control Module (ECM) through the heated Air Fuel Ratio (A/F) Sensor 1 heater.