AutoCodes – Honda – P1165 1999 Honda Civic

P1165 1999 Honda Civic Code - Air/Fuel Ratio Sensor 1 Circuit Range/Performance

Quick Answer

The Air/Fuel Ratio (A/F) sensor 1 is installed in the exhaust system and detects oxygen content in the exhaust gas. Common causes include Air/Fuel Ratio Sensor 1 harness is open or shorted, Air/Fuel Ratio Sensor 1 circuit poor electrical connection, Faulty Air/Fuel Ratio Sensor 1. 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 1999 Honda Civic indicates Air/Fuel Ratio Sensor 1 Circuit Range/Performance.
Common causes: Common causes include Air/Fuel Ratio Sensor 1 harness is open or shorted, Air/Fuel Ratio Sensor 1 circuit poor electrical connection, Faulty Air/Fuel Ratio Sensor 1.
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.

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Code Popularity 3,097

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 04, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1165 1999 Honda Civic Description

The Air/Fuel Ratio (A/F) sensor 1 is installed in the exhaust system and detects oxygen content in the exhaust gas. The A/F sensor transmits output voltage to the Engine Control Module (ECM). A heater for the sensor element is embedded in the A/F sensor (sensor 1). It is activated and heats the sensor to stabilize and speed the detection of oxygen content by controlling current flowing through the heater. An increase in the current levels off as the applied voltage to the element electrode reaches a certain range because the amount of oxygen which is led through the diffusion layer is limited. The current amperage is proportional to oxygen content in the exhaust gas, so the air/fuel ratio is detected by the measurement of the current amperage. The ECM compares a set target air/fuel ratio with the detected air/fuel ratio and controls the fuel injection timing.
If the A/F sensor (sensor 1) voltage is low, the air/fuel ratio is lean, and the ECM uses A/F feedback control to issue a Rich command. If the A/F sensor (sensor 1) voltage is high, the air/fuel ratio is rich, and the ECM uses A/F feedback control to issue a Lean command.

OBDII Code P1165 1999 Honda Civic - Air/Fuel Ratio Sensor 1 Circuit Range/Performance - AutoCodes.com — P1165 1999 Honda Civic Code - Air/Fuel Ratio Sensor 1 Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P1165 1999 Honda Civic?

Air/Fuel Ratio Sensor 1 harness is open or shorted
Air/Fuel Ratio Sensor 1 circuit poor electrical connection
Faulty Air/Fuel Ratio Sensor 1

How to Fix the DTC P1165 1999 Honda Civic?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1165 1999 Honda Civic code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1165 1999 Honda Civic code?

Need more information on how to fix the P1165 1999 Honda Civic code? Get Access to Factory Service Manuals

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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.

Frequently Asked Questions about P1165 1999 Honda Civic Code

1. What are common symptoms of OBDII code P1165 on a 1999 Honda Civic?

- Common symptoms include poor fuel economy, rough idling, engine misfires, and possibly a Check Engine light illuminated on the dashboard.

2. What causes the OBDII code P1165 to be triggered in a 1999 Honda Civic?

- The code P1165 is typically triggered by a faulty Air/Fuel Ratio Sensor 1, issues with the sensor's circuit, wiring problems, or a vacuum leak in the intake system.

3. How can I diagnose the OBDII code P1165 on my 1999 Honda Civic?

- To diagnose the issue, you can use an OBDII scanner to read the code, visually inspect the sensor and its wiring for any damage, and perform a voltage test on the sensor to check its functionality.

4. Can I drive my 1999 Honda Civic with the OBDII code P1165?

- It is not recommended to drive the vehicle with the code P1165 present, as it can lead to poor engine performance and potential damage over time. It is best to address the issue promptly.

5. How can I repair the OBDII code P1165 on my 1999 Honda Civic?

- Repair options may include replacing the Air/Fuel Ratio Sensor 1, repairing any damaged wiring or connections, addressing any vacuum leaks, and clearing the error code using an OBDII scanner.

6. Is it possible to reset the OBDII code P1165 on a 1999 Honda Civic without fixing the underlying issue?

- While you can clear the error code temporarily using an OBDII scanner, the Check Engine light will likely reappear if the root cause of the problem is not addressed.

7. How much does it cost to repair the OBDII code P1165 on a 1999 Honda Civic?

- The cost of repair can vary depending on the exact issue, but it may range from $100 to $300 for parts and labor if you need to replace the Air/Fuel Ratio Sensor 1.

8. Can a DIY enthusiast fix the OBDII code P1165 on a 1999 Honda Civic?

- Yes, if you have the necessary tools, skills, and knowledge, you may be able to replace the Air/Fuel Ratio Sensor 1 or repair the wiring yourself. However, professional help is recommended for accurate diagnosis.

9. Will the OBDII code P1165 affect the emissions test on my 1999 Honda Civic?

- Yes, the code P1165 can cause your vehicle to fail the emissions test due to its impact on fuel mixture control and overall engine performance.

10. How often does the OBDII code P1165 occur in a 1999 Honda Civic?

- The occurrence of the code P1165 can vary depending on the vehicle's maintenance history, driving conditions, and other factors, but it is a relatively common issue in older Honda Civics.