AutoCodes – Nissan – P0159 2007 Nissan Pathfinder

P0159 2007 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 2007 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.

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Code Popularity 2,222

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
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Code P0159 2007 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 2007 Nissan Pathfinder - HO2S22 Slow Response - AutoCodes.com — P0159 2007 Nissan Pathfinder Code - HO2S22 Slow Response

What does this mean?

What are the Possible Causes of the DTC P0159 2007 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 2007 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 2007 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.

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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 P0159 2007 Nissan Pathfinder Code

1. What does the OBDII code P0159 for a 2007 Nissan Pathfinder indicate?

The code P0159 for a 2007 Nissan Pathfinder specifically refers to a slow response from the downstream oxygen sensor (HO2S22).

2. What are the common symptoms associated with the P0159 trouble code?

Common symptoms of the P0159 code include decreased fuel efficiency, engine hesitation, rough idling, and potential engine misfires.

3. What are the possible causes of the HO2S22 slow response code in a 2007 Nissan Pathfinder?

Potential causes of the P0159 code in a 2007 Nissan Pathfinder include a faulty oxygen sensor, wiring issues, exhaust system leaks, or an engine vacuum leak.

4. How can I diagnose the P0159 trouble code on my 2007 Nissan Pathfinder?

Diagnosing the P0159 code typically involves using an OBDII scanner to retrieve the code, inspecting the downstream oxygen sensor and its wiring, and checking for any exhaust system leaks.

5. Can I continue driving my 2007 Nissan Pathfinder with the P0159 code present?

It is not recommended to continue driving your vehicle with the P0159 code active, as it can lead to further engine issues and potential damage if left unresolved.

6. How can I repair the P0159 code on my 2007 Nissan Pathfinder?

Repairing the P0159 code may involve replacing the downstream oxygen sensor, repairing any damaged wiring, fixing exhaust leaks, or addressing any vacuum leaks in the engine.

7. Will resetting the trouble codes make the P0159 code go away permanently?

Simply resetting the trouble codes may temporarily clear the P0159 code, but if the underlying issue causing the slow response from the oxygen sensor is not fixed, the code is likely to reappear.

8. Is it possible to prevent the P0159 trouble code from occurring in the future?

Regular maintenance of your 2007 Nissan Pathfinder, including timely replacement of oxygen sensors and inspection of the exhaust system, can help prevent the recurrence of the P0159 code.

9. Can a mechanic help me fix the P0159 code on my 2007 Nissan Pathfinder?

Yes, a qualified mechanic can assist in diagnosing and repairing the P0159 code on your 2007 Nissan Pathfinder to ensure proper functioning of the oxygen sensor and the vehicle's engine.

10. How important is it to address the P0159 code promptly on a 2007 Nissan Pathfinder?

It is crucial to address the P0159 code promptly to prevent potential engine damage, maintain fuel efficiency, and ensure the overall performance and longevity of your 2007 Nissan Pathfinder.