AutoCodes – Nissan – P0159 2008 Nissan Sentra

P0159 2008 Nissan Sentra 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 Sentra 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 2,160

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0159 2008 Nissan Sentra 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 Sentra - HO2S22 Slow Response - AutoCodes.com — P0159 2008 Nissan Sentra Code - HO2S22 Slow Response

What does this mean?

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

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 Sentra?

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 Sentra 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 Sentra code?

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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 2008 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0159 in a 2008 Nissan Sentra?

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

2. What does the OBDII code P0159 for a 2008 Nissan Sentra indicate?

- The code indicates a slow response from the downstream oxygen sensor (HO2S22) located after the catalytic converter.

3. What are the possible causes of OBDII code P0159 in a 2008 Nissan Sentra?

- Possible causes include a faulty oxygen sensor, wiring issues in the sensor circuit, exhaust leaks, vacuum leaks, or a malfunctioning catalytic converter.

4. How can I diagnose the cause of OBDII code P0159 in my 2008 Nissan Sentra?

- Diagnose by inspecting the oxygen sensor and its wiring, checking for exhaust or vacuum leaks, and testing the catalytic converter's efficiency.

5. Can I drive my 2008 Nissan Sentra with the P0159 code?

- It is not recommended to drive the vehicle for an extended period with the P0159 code, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.

6. How can I repair OBDII code P0159 in my 2008 Nissan Sentra?

- Repair options include replacing the downstream oxygen sensor (HO2S22), repairing any damaged wiring, fixing exhaust or vacuum leaks, or replacing a faulty catalytic converter.

7. Are there any tips for preventing OBDII code P0159 in my 2008 Nissan Sentra?

- Regular maintenance of the oxygen sensors, ensuring the exhaust system is free of leaks, and using high-quality fuel can help prevent the occurrence of code P0159.

8. Can a DIY enthusiast fix OBDII code P0159 in a 2008 Nissan Sentra?

- Depending on the individual's skill level, a DIY enthusiast can potentially fix the issue by replacing the oxygen sensor or repairing wiring issues. However, complex repairs may require professional help.

9. How much does it cost to repair OBDII code P0159 in a 2008 Nissan Sentra?

- The cost of repair can vary based on the exact cause of the code, but typically ranges from $100 to $400 for parts and labor, with sensor replacement being a common repair.

10. Will resetting the OBDII code P0159 in my 2008 Nissan Sentra make it go away permanently?

- Simply resetting the code may temporarily turn off the Check Engine Light, but unless the underlying issue is fixed, the code is likely to return after some time.