AutoCodes – Nissan – P0159 2002 Nissan Altima Sedan

P0159 2002 Nissan Altima Sedan 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 2002 Nissan Altima Sedan 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 3,119

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 2002 Nissan Altima Sedan 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 2002 Nissan Altima Sedan - HO2S22 Slow Response - AutoCodes.com — P0159 2002 Nissan Altima Sedan Code - HO2S22 Slow Response

What does this mean?

What are the Possible Causes of the DTC P0159 2002 Nissan Altima Sedan?

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 2002 Nissan Altima Sedan?

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 2002 Nissan Altima Sedan 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 2002 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0159 on a 2002 Nissan Altima Sedan?

- Common symptoms include poor fuel economy, rough idling, hesitation during acceleration, and an illuminated check engine light.

2. What does the OBDII code P0159 indicate for a 2002 Nissan Altima Sedan?

- OBDII code P0159 indicates a slow response from the HO2S22 (Heated Oxygen Sensor Bank 2 Sensor 2) in the exhaust system.

3. What are the possible causes of OBDII code P0159 on a 2002 Nissan Altima Sedan?

- Potential causes include a faulty HO2S22 sensor, wiring issues, exhaust leaks, engine misfires, or a malfunctioning catalytic converter.

4. How can I diagnose the cause of OBDII code P0159 on my 2002 Nissan Altima Sedan?

- A thorough diagnostic process involves inspecting the HO2S22 sensor and its wiring, checking for exhaust leaks, addressing any engine misfires, and testing the catalytic converter.

5. What are some repair tips for resolving OBDII code P0159 on a 2002 Nissan Altima Sedan?

- Repair tips may include replacing the HO2S22 sensor, repairing damaged wiring, fixing exhaust leaks, addressing engine misfires, or replacing a faulty catalytic converter.

6. Can I drive my 2002 Nissan Altima Sedan with OBDII code P0159?

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

7. How much does it typically cost to repair OBDII code P0159 on a 2002 Nissan Altima Sedan?

- The cost of repairing OBDII code P0159 can vary depending on the specific cause, but it may range from $100 to $500 or more, including parts and labor.

8. Are there any precautions I should take when attempting to fix OBDII code P0159 on my 2002 Nissan Altima Sedan?

- It is essential to follow proper safety procedures, disconnect the battery before working on the vehicle, and consult a repair manual or seek professional assistance if unsure.

9. How often does OBDII code P0159 occur in 2002 Nissan Altima Sedans?

- OBDII code P0159 can occur sporadically in 2002 Nissan Altima Sedans due to sensor aging, wiring issues, or other factors, but regular maintenance can help prevent its occurrence.

10. Can a DIY enthusiast without extensive automotive experience fix OBDII code P0159 on a 2002 Nissan Altima Sedan?

- While some repairs related to OBDII code P0159 can be tackled by DIY enthusiasts, it is recommended to have some automotive knowledge or seek professional help for complex issues.