AutoCodes – Infiniti – P1164 2003 Infiniti G35

P1164 2003 Infiniti G35 Code - HO2S21 Rich Shift Monitoring

Quick Answer

The Heated Oxygen Sensor 1 is placed into the exhaust manifold. Common causes include Faulty O2 Sensor Heater Bank 2 Sensor 1, O2 Sensor Heater Bank 2 Sensor 1 harness is open or shorted, O2 Sensor Heater Bank 2 Sensor 1 circuit poor electrical connection. 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 2003 Infiniti G35 indicates HO2S21 Rich Shift Monitoring.
Common causes: Common causes include Faulty O2 Sensor Heater Bank 2 Sensor 1, O2 Sensor Heater Bank 2 Sensor 1 harness is open or shorted, O2 Sensor Heater Bank 2 Sensor 1 circuit poor electrical connection.
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 3,197

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 Apr 01, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1164 2003 Infiniti G35 Description

The Heated Oxygen Sensor 1 is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1 to 0V.

OBDII Code P1164 2003 Infiniti G35 - HO2S21 Rich Shift Monitoring - AutoCodes.com — P1164 2003 Infiniti G35 Code - HO2S21 Rich Shift Monitoring

What does this mean?

What are the Possible Causes of the DTC P1164 2003 Infiniti G35?

Faulty O2 Sensor Heater Bank 2 Sensor 1
O2 Sensor Heater Bank 2 Sensor 1 harness is open or shorted
O2 Sensor Heater Bank 2 Sensor 1 circuit poor electrical connection

How to Fix the DTC P1164 2003 Infiniti G35?

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 P1164 2003 Infiniti G35 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.

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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 P1164 2003 Infiniti G35 Code

1. What are the common symptoms of OBDII code P1164 in a 2003 Infiniti G35?

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

2. What does the OBDII code P1164 "HO2S21 Rich Shift Monitoring" mean in a 2003 Infiniti G35?

- This code indicates that the oxygen sensor 2, bank 1 (HO2S21), is detecting a rich air-fuel mixture during shifts.

3. What are the possible causes of OBDII code P1164 in a 2003 Infiniti G35?

- The code P1164 in a 2003 Infiniti G35 can be triggered by issues such as a faulty oxygen sensor, vacuum leaks, fuel pressure problems, or a malfunctioning fuel injector.

4. How can I diagnose the OBDII code P1164 in my 2003 Infiniti G35?

- Diagnosing OBDII code P1164 involves using a scan tool to read the code, checking the oxygen sensor readings, inspecting for vacuum leaks, and testing the fuel pressure and injectors.

5. What are the potential repair options for OBDII code P1164 in a 2003 Infiniti G35?

- Repair options for code P1164 may include replacing the oxygen sensor, fixing any vacuum leaks, addressing fuel pressure issues, or cleaning/replacing faulty fuel injectors.

6. Can I continue driving my 2003 Infiniti G35 with OBDII code P1164 present?

- It is not recommended to drive your vehicle with code P1164 active, as it can lead to decreased fuel efficiency and potential damage to the engine over time.

7. How much does it typically cost to repair OBDII code P1164 in a 2003 Infiniti G35?

- The cost of repairing code P1164 can vary depending on the specific cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

8. Will resetting the OBDII system turn off the P1164 code in my 2003 Infiniti G35?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear after driving the vehicle for some time.

9. How urgent is it to address OBDII code P1164 in a 2003 Infiniti G35?

- While the vehicle may still be operational with code P1164, it is advisable to address the issue promptly to prevent further damage and maintain optimal engine performance.

10. Can a DIY enthusiast fix OBDII code P1164 in a 2003 Infiniti G35?

- Depending on the specific cause, some DIY enthusiasts with the necessary skills and tools may be able to address code P1164 themselves by replacing the oxygen sensor, fixing vacuum leaks, or cleaning fuel injectors.