Engine-Codes - Generic - P1286

P1286 Code - Air Fuel Ratio Sensor 1 Circuit High Voltage Detected Bank 2

- Code Popularity: 41,166 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1286?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty air fuel ratio (A/F) sensor 1 heater Bank 2
  • Air fuel ratio (A/F) harness is open or shorted
  • Air fuel ratio (A/F) circuit poor electrical connection
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How to Fix the DTC P1286?

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 pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1286 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the 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 heater in the element.
The sensor is capable of precise measurement λ= 1, but also in the lean and rich range. Together with its control electronics, the sensor outputs a clear, continuous signal throughout a wide λ range (0.7 < λ < air).
The exhaust gas components diffuse through the diffusion gap at the electrode of the oxygen pump and Nernst concentration cell, where they are brought to thermodynamic balance.
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 able to indicate air/fuel ratio by this pumping of current. In addition, a heater is integrated in the sensor to ensure the required operating temperature of 700 - 800 C (1,292 - 1,472 F).

P1286 Code - Air Fuel Ratio Sensor 1 Circuit High Voltage Detected Bank 2

Need more Information on the Code?

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Code P1286 Information for Specific Makes

  • P1286 Acura Engine Oil Pressure Sensor Stuck Low
  • P1286 Buick Accelerator Pedal Position Sensor 3 Performance
  • P1286 Cadillac Accelerator Pedal Position Sensor 3 Performance
  • P1286 Chevrolet Accelerator Pedal Position Sensor 3 Circuit Performance
  • P1286 Chrysler Accelerator Position Sensor Supply Voltage Too High
  • P1286 Dodge Accelerator Position Sensor Supply Voltage Too High
  • P1286 Ford Fuel Pulse In Range But Lower Than Expected
  • P1286 GMC Accelerator Pedal Position Sensor 3 Circuit Performance
  • P1286 Honda Engine Oil Pressure Sensor Stuck Low
  • P1286 Infiniti Air Fuel Ratio Sensor 1 Circuit High Voltage Detected Bank 2
  • P1286 Nissan Air Fuel Ratio Sensor 1 Circuit High Voltage Detected Bank 2
  • P1286 Volkswagen Fuel Injection Air Control Valve Circuit Short To B+

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