P0139 2007 Nissan Maxima Code - HO2S12 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 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 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
- P0139 2007 Nissan Maxima indicates HO2S12 Slow Response.
- Common causes
- Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 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.
Code P0139 2007 Nissan Maxima Description
What are the Possible Causes of the DTC P0139 2007 Nissan Maxima?
- Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks
How to Fix the DTC P0139 2007 Nissan Maxima?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0139 2007 Nissan Maxima 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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Frequently Asked Questions about P0139 2007 Nissan Maxima Code
1. What are the common symptoms of OBDII code P0139 on a 2007 Nissan Maxima?
- Common symptoms include poor fuel economy, rough idling, hesitation during acceleration, and the illumination of the Check Engine Light.
2. What does the OBDII code P0139 "HO2S12 Slow Response" mean for a 2007 Nissan Maxima?
- This code indicates that the downstream oxygen sensor (HO2S12) is taking too long to respond to changes in the air-fuel mixture, potentially causing issues with the vehicle's performance and emissions.
3. What are the possible causes of the P0139 code on a 2007 Nissan Maxima?
- Common causes include a faulty oxygen sensor, wiring or connector issues, exhaust leaks, engine misfires, vacuum leaks, or a malfunctioning catalytic converter.
4. How can I diagnose the P0139 code on my 2007 Nissan Maxima?
- Diagnosing the P0139 code typically involves inspecting the oxygen sensor, checking for exhaust leaks, testing the sensor's wiring and connectors, and scanning for any related trouble codes.
5. What are the recommended repair tips for resolving the P0139 code on a 2007 Nissan Maxima?
- Repair tips may include replacing the downstream oxygen sensor, repairing any damaged wiring or connectors, fixing exhaust leaks, addressing engine misfires, and ensuring proper operation of the catalytic converter.
6. Can I drive my 2007 Nissan Maxima with the P0139 code present?
- It is generally not recommended to drive with the P0139 code active, as it can lead to reduced fuel efficiency, engine performance issues, and potential damage to the catalytic converter over time.
7. How much does it typically cost to repair the P0139 code on a 2007 Nissan Maxima?
- The cost of repairing the P0139 code can vary depending on the specific issue causing the code. Costs may include parts such as an oxygen sensor, labor for diagnosis and repairs, and any additional components that need to be replaced.
8. Will resetting the Check Engine Light resolve the P0139 code on a 2007 Nissan Maxima?
- While resetting the Check Engine Light may temporarily turn it off, it will not fix the underlying issue causing the P0139 code. It is important to diagnose and repair the problem to prevent further complications.
9. How often does the HO2S12 sensor need to be replaced on a 2007 Nissan Maxima?
- The downstream oxygen sensor (HO2S12) may need to be replaced if it fails or becomes slow to respond. There is no specific interval for replacement, but it is recommended to follow manufacturer guidelines and address any related issues promptly.
10. Can a DIY enthusiast replace the HO2S12 sensor on a 2007 Nissan Maxima?
- Replacing the downstream oxygen sensor (HO2S12) can be a DIY project for those with mechanical experience and the necessary tools. However, if unsure, it is recommended to consult a professional mechanic for proper installation and diagnosis of the P0139 code.
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