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P0052 Infiniti Code - Air Fuel Ratio Sensor 1 Heater Bank 2 Control Circuit High

Quick Answer

The P0052 Infiniti diagnostic trouble code indicates a problem with the Air Fuel Ratio Sensor 1 Heater Bank 2 Control Circuit being too high. Common causes include Faulty Air Fuel Ratio Sensor, Wiring or connector issues in the heater circuit, ECM software issues. 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
P0052 Infiniti indicates Air Fuel Ratio Sensor 1 Heater Bank 2 Control Circuit High.
Common causes
Common causes include Faulty Air Fuel Ratio Sensor, Wiring or connector issues in the heater circuit, ECM software issues.
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 06, 2024
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Code P0052 Infiniti Description

The P0052 Infiniti diagnostic trouble code indicates a problem with the Air Fuel Ratio Sensor 1 Heater Bank 2 Control Circuit being too high. This sensor is responsible for monitoring the air-fuel ratio in the exhaust system and sending this information to the engine control module (ECM). The heater circuit in the sensor is used to bring the sensor to operating temperature quickly, allowing it to accurately measure the air-fuel ratio.

OBDII Code P0052 Infiniti - Air Fuel Ratio Sensor 1 Heater Bank 2 Control Circuit High
P0052 Infiniti Code - Air Fuel Ratio Sensor 1 Heater Bank 2 Control Circuit High

Common Causes of P0052 Infiniti

  1. Faulty Air Fuel Ratio Sensor
  2. Wiring or connector issues in the heater circuit
  3. ECM software issues
  4. Exhaust leaks near the sensor
  5. Issues with the catalytic converter

Symptoms of P0052 Infiniti

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine misfires
  4. Check Engine Light illuminated
  5. Reduced engine performance

How to Fix P0052 Infiniti

  1. Begin by conducting a visual inspection of the wiring and connectors related to the Air Fuel Ratio Sensor. Look for any signs of damage, corrosion, or loose connections.
  2. Test the Air Fuel Ratio Sensor using a multimeter to check for proper voltage and resistance. Replace the sensor if it is found to be faulty.
  3. Check the heater circuit for continuity and proper voltage. Repair any wiring or connectors that are damaged or loose.
  4. Clear the trouble code from the ECM using an OBD-II scanner and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostic testing may be required to identify any underlying issues with the ECM or catalytic converter.

Cost to Fix P0052 Infiniti

The cost of repairing a P0052 Infiniti code can vary depending on the specific cause of the issue. In general, the cost of replacing an Air Fuel Ratio Sensor can range from $100 to $300, including parts and labor. If additional repairs or diagnostic testing are needed, the total cost could increase. It's important to consult with a qualified mechanic to get an accurate estimate based on the specific circumstances of your vehicle. Labor rates at auto repair shops typically range from $80 to $150 per hour, but these rates can vary based on location and shop.

What does this mean?

Tech Notes for P0052 Infiniti

For models before 2006 see: P0052 Infiniti

When is the Code Detected?

The P0052 is set when the ECM detects an excessively low voltage through the heated oxygen sensor heater circuit

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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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