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P1146 Infiniti Code - Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1

Quick Answer

The P1146 code for Infiniti vehicles indicates an issue with the Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1. Common causes include Faulty Heated Oxygen Sensor 2, Damaged wiring or connectors, Vacuum 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
P1146 Infiniti indicates Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1.
Common causes
Common causes include Faulty Heated Oxygen Sensor 2, Damaged wiring or connectors, Vacuum 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 10, 2024
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Code P1146 Infiniti Description

The P1146 code for Infiniti vehicles indicates an issue with the Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1. The Heated Oxygen Sensor (HO2S) is a crucial component of the vehicle's emissions control system, responsible for measuring the oxygen content in the exhaust gases. This information is used by the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion efficiency.

OBDII Code P1146 Infiniti - Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1
P1146 Infiniti Code - Heated Oxygen Sensor 2 Minimum Voltage Monitoring Bank 1

Common Causes of P1146 Infiniti

  1. Faulty Heated Oxygen Sensor 2
  2. Damaged wiring or connectors
  3. Vacuum leaks
  4. Exhaust leaks
  5. Engine running rich or lean

Symptoms of P1146 Infiniti

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

How to Fix P1146 Infiniti

  1. Diagnose the issue by using a scan tool to determine the exact cause of the code.
  2. Inspect the Heated Oxygen Sensor 2 and its wiring for any damage or corrosion.
  3. Replace the Heated Oxygen Sensor 2 if it is found to be faulty.
  4. Repair any damaged wiring or connectors.
  5. Clear the code and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1146 Infiniti

The typical repair costs for addressing a P1146 code on an Infiniti vehicle can range from $150 to $400, including parts and labor. It's important to note that the 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. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's recommended to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for P1146 Infiniti

Replacing the O2 Sensor 2 usually takes care of the problem

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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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