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P1288 Infiniti Code - Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2

Quick Answer

The P1288 diagnostic trouble code for Infiniti vehicles indicates a problem with the Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2. Common causes include Faulty air fuel ratio sensor, Wiring issues or poor connections, Exhaust leaks. 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
P1288 Infiniti indicates Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2.
Common causes
Common causes include Faulty air fuel ratio sensor, Wiring issues or poor connections, Exhaust leaks.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P1288 Infiniti Description

The P1288 diagnostic trouble code for Infiniti vehicles indicates a problem with the Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2. This code is specifically related to the oxygen sensor that monitors the air-fuel ratio in the exhaust system. The oxygen sensor plays a crucial role in ensuring the engine runs efficiently and cleanly by providing feedback to the engine control module (ECM) to adjust the air-fuel mixture.

OBDII Code P1288 Infiniti - Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2
P1288 Infiniti Code - Air Fuel Ratio Sensor 1 Circuit Slow Response Bank 2

Common Causes of P1288 Infiniti

  1. Faulty air fuel ratio sensor
  2. Wiring issues or poor connections
  3. Exhaust leaks
  4. ECM malfunction
  5. Fuel system problems

Symptoms of P1288 Infiniti

  1. Decreased fuel efficiency
  2. Engine misfires or hesitation
  3. Check Engine Light illuminated
  4. Rough idling or stalling
  5. Increased emissions output

How to Fix P1288 Infiniti

  1. Diagnose the specific cause of the slow response in the air fuel ratio sensor.
  2. Replace the faulty sensor if necessary.
  3. Repair any wiring issues or connections.
  4. Check for and repair any exhaust leaks.
  5. Reset the ECM and clear the diagnostic trouble code.

Cost to Fix P1288 Infiniti

The cost of repairing a P1288 code in an Infiniti vehicle can vary depending on the specific cause of the issue. Typically, the cost of replacing an air fuel ratio sensor can range from $150 to $400, including parts and labor. Additional costs may be incurred if wiring repairs or other components need to be replaced. It is recommended to consult with a certified mechanic to get an accurate estimate based on the specific circumstances of your vehicle. Labor rates at auto repair shops can vary, so it is advisable to check local rates for a more precise estimate.

When is the Code Detected?

The response (from RICH to LEAN) of the A/F signal computed by ECM from A/F sensor 1 signal takes more than the specified time.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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