AutoCodes – Infiniti – P0158 2005 Infiniti G35

P0158 2005 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 2005 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,659

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0158 2005 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 2005 Infiniti G35 - HO2S22 Circuit High Voltage - AutoCodes.com — P0158 2005 Infiniti G35 Code - HO2S22 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0158 2005 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 2005 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 2005 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.

Need more information about the P0158 2005 Infiniti G35 code?

Need more information on how to fix the P0158 2005 Infiniti G35 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0158 2005 Infiniti G35 code diagnosed by a professional: Find a repair shop in your area

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 2005 Infiniti G35 Code

1. What are the common symptoms of OBDII code P0158 on a 2005 Infiniti G35?

- Common symptoms include poor fuel efficiency, rough idling, engine misfires, and possible stalling.

2. What does the OBDII code P0158 "HO2S22 Circuit High Voltage" mean for a 2005 Infiniti G35?

- This code indicates that the oxygen sensor in bank 2 sensor 2 is detecting a high voltage condition, which may lead to inaccurate fuel mixture readings.

3. What are the possible causes of OBDII code P0158 on a 2005 Infiniti G35?

- Potential causes include a faulty oxygen sensor, wiring issues, a damaged sensor connector, exhaust leaks, or a problem with the engine's computer.

4. How can I diagnose the OBDII code P0158 on a 2005 Infiniti G35?

- Diagnosing the code typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the oxygen sensor and related wiring, and checking for exhaust leaks.

5. Can I still drive my 2005 Infiniti G35 with OBDII code P0158?

- It is generally not recommended to drive the vehicle with this fault code as it can lead to poor engine performance and potential damage over time.

6. How can I repair OBDII code P0158 on a 2005 Infiniti G35?

- Repair options may include replacing the oxygen sensor, repairing or replacing damaged wiring, fixing any exhaust leaks, and clearing the fault code with an OBDII scanner.

7. Is it possible to reset the OBDII code P0158 on a 2005 Infiniti G35 without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is crucial to address the root cause to prevent the issue from recurring.

8. How much does it cost to fix OBDII code P0158 on a 2005 Infiniti G35?

- The cost of repair can vary depending on the specific cause of the fault, but it may involve parts and labor expenses ranging from $100 to $300 or more.

9. Will OBDII code P0158 cause my 2005 Infiniti G35 to fail an emissions test?

- Yes, this code can cause your vehicle to fail an emissions test due to the improper functioning of the oxygen sensor affecting the vehicle's emissions levels.

10. How often does OBDII code P0158 occur in a 2005 Infiniti G35?

- The occurrence of this code can vary, but it is not uncommon in older vehicles like the 2005 Infiniti G35, especially as components age and wear out.