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P0152 Infiniti Code - O2 Sensor Circuit High Bank 2 Sensor 1

Quick Answer

The P0152 code for Infiniti vehicles refers to an issue with the O2 sensor circuit on Bank 2 Sensor 1. Common causes include Faulty O2 sensor on Bank 2 Sensor 1, Damaged wiring or connectors in the sensor circuit, Vacuum leaks 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
P0152 Infiniti indicates O2 Sensor Circuit High Bank 2 Sensor 1.
Common causes
Common causes include Faulty O2 sensor on Bank 2 Sensor 1, Damaged wiring or connectors in the sensor circuit, Vacuum leaks 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P0152 Infiniti Description

The P0152 code for Infiniti vehicles refers to an issue with the O2 sensor circuit on Bank 2 Sensor 1. The O2 sensor, also known as the oxygen sensor, plays a crucial role in monitoring the oxygen levels in the exhaust gases and providing feedback to the engine control module (ECM) for optimal fuel efficiency and emissions control. Bank 2 Sensor 1 specifically refers to the sensor located on the side of the engine that contains cylinder number 2, and it is positioned before the catalytic converter.

OBDII Code P0152 Infiniti - O2 Sensor Circuit High Bank 2 Sensor 1
P0152 Infiniti Code - O2 Sensor Circuit High Bank 2 Sensor 1

Common Causes of P0152 Infiniti

  1. Faulty O2 sensor on Bank 2 Sensor 1
  2. Damaged wiring or connectors in the sensor circuit
  3. Vacuum leaks in the intake system
  4. Exhaust system leaks
  5. ECM issues or software malfunctions

Symptoms of P0152 Infiniti

  1. Decreased fuel efficiency
  2. Engine misfires or rough idling
  3. Check Engine Light illuminated on the dashboard
  4. Reduced engine power or acceleration
  5. Increased emissions output

How to Fix P0152 Infiniti

  1. Diagnose the specific cause by performing a thorough inspection of the O2 sensor, wiring, and related components.
  2. Replace the faulty O2 sensor on Bank 2 Sensor 1 with a new, high-quality sensor.
  3. Repair or replace any damaged wiring or connectors in the sensor circuit.
  4. Check for and repair any vacuum leaks or exhaust system leaks that may be affecting the air-fuel mixture.
  5. Clear the diagnostic trouble codes, reset the ECM, and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0152 Infiniti

The typical cost for repairing the O2 sensor circuit high on Bank 2 Sensor 1 in an Infiniti vehicle can range from $200 to $500, including parts and labor. However, it's essential to note that the actual cost may vary based on the specific diagnosis time, labor rates at the auto repair shop, 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 at dealerships or metropolitan areas and lower at independent shops. To obtain a precise estimate, it is recommended to inquire with local repair shops.

What does this mean?

Tech Notes for P0152 Infiniti

Replacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem.

For Infiniti models 2005 and up see: P0152 Infiniti

When is the Code Detected?

An excessively high voltage from the sensor is sent to Engine Control Module (ECM).

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Information for Specific Infiniti Models

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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