P1289 Nissan Code - Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2
Quick Answer
The A/F sensor is a planar dual-cell limit current sensor. Common causes include Faulty Air Fuel Ratio (A/F) Sensor 1 Bank 2, Air Fuel Ratio (A/F) Sensor 1 Bank 2 harness is open or shorted, Air Fuel Ratio (A/F) Sensor 1 Bank 2 circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1289 Nissan indicates Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2.
- Common causes
- Common causes include Faulty Air Fuel Ratio (A/F) Sensor 1 Bank 2, Air Fuel Ratio (A/F) Sensor 1 Bank 2 harness is open or shorted, Air Fuel Ratio (A/F) Sensor 1 Bank 2 circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1289 Nissan Description
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).
What are the Possible Causes of the DTC P1289 Nissan?
- Faulty Air Fuel Ratio (A/F) Sensor 1 Bank 2
- Air Fuel Ratio (A/F) Sensor 1 Bank 2 harness is open or shorted
- Air Fuel Ratio (A/F) Sensor 1 Bank 2 circuit poor electrical connection
- Low fuel pressure
- Faulty Fuel injector
- Intake air leaks
- Exhaust Gas leaks
- Faulty PVC
- Faulty Air Flow Meter
How to Fix the DTC P1289 Nissan?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1289 Nissan code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Nissan Models
- P1289 2004 Nissan Maxima — Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2
- P1289 2005 Nissan Maxima — Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2
Frequently Asked Questions about P1289 Nissan Code
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