AutoCodes – Infiniti – P0158 2006 Infiniti G35

P0158 2006 Infiniti G35 Code - HO2S22 Circuit High Voltage

Quick Answer

The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0158 2006 Infiniti G35 indicates HO2S22 Circuit High Voltage.
Common causes: Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted, Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 3,022

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0158 2006 Infiniti G35 Description

The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.

OBDII Code P0158 2006 Infiniti G35 - HO2S22 Circuit High Voltage - AutoCodes.com — P0158 2006 Infiniti G35 Code - HO2S22 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0158 2006 Infiniti G35?

Faulty Rear Heated Oxygen Sensor Bank 2
Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks
Exhaust gas leaks

How to Fix the DTC P0158 2006 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 does this mean?

Code Tech Notes

Replacing the Rear Heated Oxygen Sensor Bank 2 usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0158 2006 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 P0158 2006 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0158 on a 2006 Infiniti G35?

- Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine light.

2. What does the HO2S22 Circuit High Voltage code mean for a 2006 Infiniti G35?

- The code indicates that the oxygen sensor 2 on bank 2 is detecting a high voltage condition, which can affect the air-fuel mixture and engine performance.

3. What are the possible causes of OBDII code P0158 on a 2006 Infiniti G35?

- Common causes include a faulty oxygen sensor, wiring issues in the sensor circuit, exhaust leaks, and engine misfires.

4. How can I diagnose the source of the high voltage in the HO2S22 circuit on my 2006 Infiniti G35?

- To diagnose the issue, you can use a multimeter to test the oxygen sensor's voltage output, inspect the sensor wiring for damage, and check for any exhaust leaks near the sensor.

5. Can I drive my 2006 Infiniti G35 with an active P0158 trouble code?

- It is not recommended to drive the vehicle with an active P0158 code, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.

6. How can I reset the OBDII code P0158 on my 2006 Infiniti G35 after making repairs?

- You can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes to clear the error code.

7. Is it necessary to replace the oxygen sensor to fix OBDII code P0158 on a 2006 Infiniti G35?

- In many cases, replacing the oxygen sensor responsible for the high voltage condition is the most effective way to resolve the P0158 trouble code.

8. Are there any DIY repair tips for addressing OBDII code P0158 on a 2006 Infiniti G35?

- DIY repair tips include checking and cleaning the oxygen sensor connectors, inspecting the sensor wiring for damage, and ensuring there are no exhaust leaks near the sensor.

9. How much does it typically cost to repair OBDII code P0158 on a 2006 Infiniti G35 at a mechanic or dealership?

- The cost of repairing OBDII code P0158 can vary depending on the specific cause, but it may range from $150 to $400 at a mechanic or dealership.

10. What are the long-term effects of ignoring OBDII code P0158 on a 2006 Infiniti G35?

- Ignoring the P0158 code can lead to decreased fuel efficiency, engine performance issues, and potential damage to the catalytic converter over time.