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P1165 Honda Code - Air/Fuel Ratio Sensor 1 Circuit Range/Performance

Quick Answer

The P1165 Honda code indicates a problem with the Air/Fuel Ratio Sensor 1 Circuit Range/Performance. Common causes include Faulty Air/Fuel Ratio Sensor 1, Wiring or connector issues, Exhaust system 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
P1165 Honda indicates Air/Fuel Ratio Sensor 1 Circuit Range/Performance.
Common causes
Common causes include Faulty Air/Fuel Ratio Sensor 1, Wiring or connector issues, Exhaust system 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 P1165 Honda Description

The P1165 Honda code indicates a problem with the Air/Fuel Ratio Sensor 1 Circuit Range/Performance. This sensor is responsible for monitoring the air-fuel mixture in the exhaust system and providing feedback to the engine control module to ensure optimal combustion. When this sensor malfunctions or fails to operate within the expected range, it can lead to a variety of performance issues and potentially cause long-term damage to the vehicle.

OBDII Code P1165 Honda - Air/Fuel Ratio Sensor 1 Circuit Range/Performance
P1165 Honda Code - Air/Fuel Ratio Sensor 1 Circuit Range/Performance

Common Causes of P1165 Honda

  1. Faulty Air/Fuel Ratio Sensor 1
  2. Wiring or connector issues
  3. Exhaust system leaks
  4. Vacuum leaks
  5. Engine control module malfunction

Symptoms of P1165 Honda

  1. Decreased fuel efficiency
  2. Rough idle or stalling
  3. Engine hesitation or misfire
  4. Illuminated check engine light
  5. Increased emissions

How to Fix P1165 Honda

  1. Diagnose the issue by using an OBD-II scanner to retrieve the specific trouble code and determine if the Air/Fuel Ratio Sensor 1 is the root cause.
  2. Inspect the wiring and connectors for any signs of damage or corrosion. Replace any faulty components.
  3. Check for exhaust leaks and repair or replace any damaged gaskets or seals.
  4. Test the Air/Fuel Ratio Sensor 1 using a multimeter to ensure it is functioning within the specified range. Replace the sensor if necessary.
  5. Clear the trouble code from the engine control module and perform a test drive to verify that the issue has been resolved.

Cost to Fix P1165 Honda

The cost of repairing a P1165 Honda code can vary depending on the specific cause of the issue. In general, replacing the Air/Fuel Ratio Sensor 1 can range from $100 to $300 for the part alone. Labor costs can add an additional $100 to $200, bringing the total repair cost to approximately $200 to $500. Keep in mind that labor rates and parts prices can vary significantly based on factors such as location, vehicle make and model, and the repair shop's hourly rates. It's advisable to consult with a trusted mechanic or dealership to obtain an accurate estimate for your specific situation.

When is the Code Detected?

If the element is not activated or the Engine Control Module (ECM) terminal voltage is a set value or less for at least a set time period when the power is drawn to the A/F sensor (sensor 1) heater, a malfunction is detected and the code is stored.

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Information for Specific Honda 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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