AutoCodes – Nissan – P0159 2009 Nissan Sentra

P0159 2009 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 2009 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 2,072

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 2009 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 2009 Nissan Sentra - HO2S22 Slow Response - AutoCodes.com — P0159 2009 Nissan Sentra Code - HO2S22 Slow Response

What does this mean?

What are the Possible Causes of the DTC P0159 2009 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 2009 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 2009 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 2009 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 2009 Nissan Sentra Code

1. What are the common symptoms of OBDII code P0159 in a 2009 Nissan Sentra?

The common symptoms of OBDII code P0159 in a 2009 Nissan Sentra include poor fuel economy, rough idling, and hesitation during acceleration.

2. What does the HO2S22 Slow Response code P0159 indicate in a 2009 Nissan Sentra?

The P0159 code indicates that the oxygen sensor (HO2S22) located after the catalytic converter is responding slowly or not properly to changes in the air-fuel mixture.

3. What are the possible causes of OBDII code P0159 in a 2009 Nissan Sentra?

Potential causes of code P0159 in a 2009 Nissan Sentra include a faulty oxygen sensor, wiring issues, exhaust leaks, or a malfunctioning catalytic converter.

4. How can I diagnose the HO2S22 Slow Response code P0159 in my 2009 Nissan Sentra?

To diagnose the P0159 code, you can use an OBDII scanner to read the code and monitor the oxygen sensor's live data to determine if it is responding within the expected parameters.

5. Can I continue driving my 2009 Nissan Sentra with the P0159 code illuminated?

While it may be possible to drive the vehicle with the P0159 code, it is recommended to address the issue promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.

6. How can I repair OBDII code P0159 in my 2009 Nissan Sentra?

Repairing the P0159 code may involve replacing the oxygen sensor (HO2S22), repairing any wiring issues, fixing exhaust leaks, or replacing a faulty catalytic converter, depending on the root cause of the problem.

7. Is it possible to reset the P0159 code in a 2009 Nissan Sentra without fixing the underlying issue?

Resetting the code without addressing the underlying problem may temporarily turn off the check engine light, but the code is likely to reappear if the root cause is not resolved.

8. How much does it cost to repair OBDII code P0159 in a 2009 Nissan Sentra?

The cost of repairing the P0159 code in a 2009 Nissan Sentra can vary depending on the specific cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P0159 in a 2009 Nissan Sentra?

While some aspects of diagnosing and repairing the P0159 code may be within reach of a skilled DIY enthusiast, dealing with oxygen sensors, exhaust systems, and catalytic converters may require specialized tools and expertise.

10. How often should I expect to encounter the P0159 code in a 2009 Nissan Sentra?

Encountering the P0159 code in a 2009 Nissan Sentra can vary depending on factors like driving conditions and maintenance history, but it is not a common code and typically indicates a specific issue with the oxygen sensor or related components.