AutoCodes – Nissan – P0159 2008 Nissan Pathfinder

P0159 2008 Nissan Pathfinder Code - HO2S22 Slow Response

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: P0159 2008 Nissan Pathfinder indicates HO2S22 Slow Response.
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 2,364

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 Mar 25, 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 P0159 2008 Nissan Pathfinder 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 P0159 2008 Nissan Pathfinder - HO2S22 Slow Response - AutoCodes.com — P0159 2008 Nissan Pathfinder Code - HO2S22 Slow Response

What does this mean?

What are the Possible Causes of the DTC P0159 2008 Nissan Pathfinder?

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 may be faulty
Exhaust gas leaks

How to Fix the DTC P0159 2008 Nissan Pathfinder?

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 O2 Sensor 2 usually takes care of the problem

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0159 2008 Nissan Pathfinder 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 P0159 2008 Nissan Pathfinder code?

Need more information on how to fix the P0159 2008 Nissan Pathfinder code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0159 2008 Nissan Pathfinder 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 P0159 2008 Nissan Pathfinder Code

1. What does OBDII code P0159 for a 2008 Nissan Pathfinder mean?

The OBDII code P0159 on a 2008 Nissan Pathfinder indicates a slow response from the oxygen sensor (HO2S22) located after the catalytic converter.

2. What are the common symptoms of HO2S22 Slow Response (P0159) in a 2008 Nissan Pathfinder?

Common symptoms of HO2S22 Slow Response (P0159) in a 2008 Nissan Pathfinder include poor fuel economy, rough idling, hesitation during acceleration, and potential stalling.

3. What are the potential causes of OBDII code P0159 on a 2008 Nissan Pathfinder?

The potential causes of OBDII code P0159 on a 2008 Nissan Pathfinder include a faulty oxygen sensor, wiring issues, exhaust leaks, or problems with the catalytic converter.

4. How can I diagnose the HO2S22 Slow Response (P0159) code on my 2008 Nissan Pathfinder?

To diagnose the HO2S22 Slow Response (P0159) code on a 2008 Nissan Pathfinder, you can use an OBDII scanner to retrieve the code and then inspect the oxygen sensor and related wiring for any damage or issues.

5. Can I drive my 2008 Nissan Pathfinder with the OBDII code P0159 (HO2S22 Slow Response)?

It is not recommended to drive your 2008 Nissan Pathfinder with the OBDII code P0159 (HO2S22 Slow Response) without addressing the issue promptly, as it can lead to poor engine performance and potential damage in the long run.

6. How do I repair OBDII code P0159 on a 2008 Nissan Pathfinder?

Repairing OBDII code P0159 on a 2008 Nissan Pathfinder involves replacing the faulty oxygen sensor (HO2S22), repairing any damaged wiring, fixing exhaust leaks, or addressing issues with the catalytic converter.

7. Is it possible to reset the OBDII code P0159 on a 2008 Nissan Pathfinder without fixing the underlying issue?

While you can clear the OBDII code P0159 on a 2008 Nissan Pathfinder with a scanner, it is crucial to address the underlying issue causing the code to prevent further engine problems.

8. How much does it typically cost to fix the HO2S22 Slow Response (P0159) code on a 2008 Nissan Pathfinder?

The cost of fixing the HO2S22 Slow Response (P0159) code on a 2008 Nissan Pathfinder can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor.

9. Can a DIY enthusiast repair the OBDII code P0159 on a 2008 Nissan Pathfinder?

While some DIY enthusiasts may have the skills to replace the oxygen sensor or address wiring issues causing OBDII code P0159 on a 2008 Nissan Pathfinder, it is recommended to consult a professional for proper diagnosis and repair.

10. How often should I check the oxygen sensors on my 2008 Nissan Pathfinder to prevent OBDII code P0159?

It is advisable to have the oxygen sensors on your 2008 Nissan Pathfinder inspected during routine maintenance or whenever you notice symptoms of poor engine performance to prevent issues like OBDII code P0159.