P1286 Code NISSAN Possible Causes
- Faulty Air/Fuel Ratio (A/F) Sensor 1 Bank 2
- Air/Fuel Ratio (A/F) Sensor 1 Bank 2 harness is open or shorted
- Poor electrical connection in the Air-Fuel Ratio (A/F) Sensor 1 Bank 2 circuit
How is the NISSAN P1286 Code Repaired?
Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and associated connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
When is the NISSAN P1286 Code Detected?
The A/F signal calculated by the ECM from the A/F sensor 1 signal is constantly approx. 0V.
What are the Possible Symptoms of NISSAN P1286 Code?
- Engine Light On (or Service Engine Soon Warning Light)
- Possible rough engine idle
What Does the NISSAN P1286 Code Mean?
The A/F sensor is a planar dual-cell limit current sensor. The sensor element of the A/F sensor is the combination of a Nernst concentration cell (sensor cell) with an oxygen pump cell, which transports ions. It has a heating element in the element.
The sensor is capable of accurately measuring λ=1, but also in the lean and rich range. With its control electronics, the sensor outputs a clear, continuous signal over a wide range (0.7 < λ < air).
The exhaust gas components diffuse through the diffusion gap at the oxygen pump electrode and the Nernst concentration cell, where they are brought to thermodynamic equilibrium.
An electronic circuit controls the pump current through the oxygen pump cell so that the composition of the exhaust gas in the diffusion gap remains constant at λ = 1. Therefore, the A/F sensor is capable of indicating the air/fuel ratio by this pumping current. Additionally, a heating element is built into the sensor to ensure the required operating temperature of 700 to 800 C (1,292 to 1,472 F).