P0151 Infiniti Code - Air Fuel Ratio Circuit Low Bank 2 Sensor 1
Quick Answer
The P0151 Infiniti code indicates a problem with the Air Fuel Ratio (A/F) sensor circuit on Bank 2 Sensor 1 in the vehicle's exhaust system. Common causes include Faulty A/F sensor, Damaged wiring or connectors in the sensor circuit, Vacuum leak in the intake system. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0151 Infiniti indicates Air Fuel Ratio Circuit Low Bank 2 Sensor 1.
- Common causes
- Common causes include Faulty A/F sensor, Damaged wiring or connectors in the sensor circuit, Vacuum leak in the intake system.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code P0151 Infiniti Description
The P0151 Infiniti code indicates a problem with the Air Fuel Ratio (A/F) sensor circuit on Bank 2 Sensor 1 in the vehicle's exhaust system. This sensor is responsible for measuring the oxygen content in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. When the A/F ratio is too low, it means that there is an excess of fuel in the mixture, leading to a rich condition.
Common Causes of P0151 Infiniti
- Faulty A/F sensor
- Damaged wiring or connectors in the sensor circuit
- Vacuum leak in the intake system
- ECM malfunction
- Exhaust system leaks
Symptoms of P0151 Infiniti
- Decreased fuel efficiency
- Engine misfires
- Rough idling or stalling
- Check Engine Light illuminated
- Increased emissions
How to Fix P0151 Infiniti
- Begin by diagnosing the specific cause of the P0151 code using a scan tool to monitor the A/F sensor's readings and inspecting the sensor, wiring, and connectors for any visible damage.
- If the A/F sensor is faulty, replace it with a new sensor compatible with your Infiniti model.
- Check and repair any damaged wiring or connectors in the sensor circuit.
- Inspect the intake system for vacuum leaks and repair as necessary.
- If the ECM is suspected to be the issue, have it tested and reprogrammed or replaced if needed.
Cost to Fix P0151 Infiniti
The typical repair costs for addressing a P0151 Infiniti code can range from $200 to $500, including parts and labor. However, it's essential to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It is recommended to inquire about local rates for a more accurate estimate.
Tech Notes for P0151 Infiniti
For Infiniti models before 2005 see: P0151 Infiniti
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