AutoCodes – Nissan – P0159 2012 Nissan Sentra

P0159 2012 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 2012 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 2,265

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 2012 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 2012 Nissan Sentra - HO2S22 Slow Response - AutoCodes.com — P0159 2012 Nissan Sentra Code - HO2S22 Slow Response

What does this mean?

What are the Possible Causes of the DTC P0159 2012 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 2012 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 2012 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 2012 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 2012 Nissan Sentra Code

1. What is OBDII code P0159 on a 2012 Nissan Sentra?

OBDII code P0159 in a 2012 Nissan Sentra indicates a slow response from the downstream oxygen sensor (HO2S22).

2. What are the common symptoms of OBDII code P0159 in a 2012 Nissan Sentra?

Common symptoms of code P0159 in a 2012 Nissan Sentra may include a decrease in fuel efficiency, rough idling, and possibly an illuminated check engine light.

3. What are the potential causes of OBDII code P0159 in a 2012 Nissan Sentra?

Potential causes of code P0159 in a 2012 Nissan Sentra include a faulty downstream oxygen sensor (HO2S22), wiring issues, exhaust leaks, or problems with the engine control module (ECM).

4. How can I diagnose OBDII code P0159 in my 2012 Nissan Sentra?

Diagnosing code P0159 in a 2012 Nissan Sentra typically involves using a scan tool to retrieve the code, inspecting the downstream oxygen sensor and related wiring, checking for exhaust leaks, and testing the ECM.

5. Can I continue driving my 2012 Nissan Sentra with OBDII code P0159?

It is not recommended to continue driving your 2012 Nissan Sentra with code P0159, as it can lead to decreased fuel efficiency and potential engine performance issues.

6. How can I repair OBDII code P0159 in my 2012 Nissan Sentra?

Repairing code P0159 in a 2012 Nissan Sentra may involve replacing the downstream oxygen sensor (HO2S22), repairing any damaged wiring, fixing exhaust leaks, or reprogramming the ECM.

7. Is it possible to reset OBDII code P0159 in a 2012 Nissan Sentra without fixing the underlying issue?

While you can clear the code temporarily, it will likely reappear if the underlying issue causing code P0159 in a 2012 Nissan Sentra is not addressed.

8. How much does it cost to fix OBDII code P0159 in a 2012 Nissan Sentra?

The cost to fix code P0159 in a 2012 Nissan Sentra can vary depending on the specific issue, but it may range from around $100 for a simple sensor replacement to a few hundred dollars for more extensive repairs.

9. Can a DIY enthusiast repair OBDII code P0159 in a 2012 Nissan Sentra?

DIY enthusiasts with the necessary tools and knowledge may be able to repair code P0159 in a 2012 Nissan Sentra, especially if it involves tasks like sensor replacement or wiring repairs.

10. How long does it take to repair OBDII code P0159 in a 2012 Nissan Sentra?

The time it takes to repair code P0159 in a 2012 Nissan Sentra can vary based on the specific issue and repair process but may typically take a few hours to half a day for most common repairs.