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P1164 Buick Code - HO2S Bank 2 Sensor 3 Rich Or High Voltage

Quick Answer

The P1164 Buick diagnostic trouble code indicates an issue with the HO2S (Heated Oxygen Sensor) Bank 2 Sensor 3 on the vehicle. Common causes include Faulty HO2S Bank 2 Sensor 3, Leaking fuel injector, Malfunctioning ECM. 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
P1164 Buick indicates HO2S Bank 2 Sensor 3 Rich Or High Voltage.
Common causes
Common causes include Faulty HO2S Bank 2 Sensor 3, Leaking fuel injector, Malfunctioning ECM.
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 P1164 Buick Description

The P1164 Buick diagnostic trouble code indicates an issue with the HO2S (Heated Oxygen Sensor) Bank 2 Sensor 3 on the vehicle. This code specifically points to the sensor reporting a rich air-fuel mixture or high voltage. The HO2S is responsible for monitoring the oxygen levels in the exhaust gases, providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion.

OBDII Code P1164 Buick - HO2S Bank 2 Sensor 3 Rich Or High Voltage
P1164 Buick Code - HO2S Bank 2 Sensor 3 Rich Or High Voltage

Common Causes of P1164 Buick

  1. Faulty HO2S Bank 2 Sensor 3
  2. Leaking fuel injector
  3. Malfunctioning ECM
  4. Fuel delivery system issues
  5. Vacuum leaks

Symptoms of P1164 Buick

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Check Engine Light illuminated
  4. Poor acceleration
  5. Increased emissions

How to Fix P1164 Buick

  1. Diagnose the code with a scan tool to confirm the issue is with the HO2S Bank 2 Sensor 3.
  2. Inspect the sensor and wiring for any damage or corrosion.
  3. Replace the HO2S Bank 2 Sensor 3 if it is determined to be faulty.
  4. Clear the code from the ECM memory and perform a road test to ensure the issue is resolved.
  5. If the code persists, further diagnosis of the fuel delivery system or ECM may be necessary.

Cost to Fix P1164 Buick

The typical repair costs for addressing a P1164 Buick code can range from $150 to $350, depending on the cost of the sensor and the labor involved. It's important to note that these are rough estimates, and actual costs may vary based on the specific diagnosis time and labor rates at auto repair shops. It is advisable to consult with a professional technician to get an accurate quote for the repair.

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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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