P1051 INFINITI Possible Causes
- Faulty Air/Fuel Ratio Sensor 1, Bank 2
- Open or short circuit in the Air/Fuel Ratio Sensor 1, Bank 2 harness
- Poor electrical connection in the Air/Fuel Ratio Sensor 1, Bank 2 circuit
How is P1051 INFINITI Code Repaired?
Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
When is the Code Detected?
The current amperage in the Heated Air/Fuel Ratio (A/F) Sensor 1 heater circuit is outside the normal range. A voltage signal that is too low is sent to the Engine Control Module (ECM) via the Heated Air/Fuel Ratio (A/F) Sensor 1 heater.
Possible Symptoms
Engine light on (or service engine soon warning light)
P1051 INFINITI Meaning
The Engine Control Module (ECM) performs ON/OFF service control of the Heated Air/Fuel Ratio (A/F) Sensor 1 heater corresponding to the engine operating condition to maintain the A/F Sensor 1 element temperature within the specified range.