P0139 2007 Nissan Maxima Code - HO2S12 Slow Response
Quick Answer
The P0139 diagnostic trouble code (DTC) for a 2007 Nissan Maxima refers to a problem with the oxygen sensor located after the catalytic converter, known as the downstream oxygen sensor or HO2S12. Common causes include Faulty oxygen sensor, Wiring or connector issues, Exhaust leaks. 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 oxygen sensor, Wiring or connector issues, Exhaust leaks.
- 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 P0139 2007 Nissan Maxima Description
The P0139 diagnostic trouble code (DTC) for a 2007 Nissan Maxima refers to a problem with the oxygen sensor located after the catalytic converter, known as the downstream oxygen sensor or HO2S12. In this case, the code specifically indicates a slow response from the sensor. The oxygen sensor plays a crucial role in measuring the oxygen levels in the exhaust gases, providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. A slow response from this sensor can lead to incorrect fuel trim adjustments, affecting engine performance, fuel efficiency, and emissions output.
Common Causes of P0139 2007 Nissan Maxima
- Faulty oxygen sensor
- Wiring or connector issues
- Exhaust leaks
- Contaminated or deteriorated sensor
- ECM malfunction
Symptoms of P0139 2007 Nissan Maxima
- Decreased fuel efficiency
- Engine misfires
- Rough idle
- Check Engine Light illuminated
- Poor acceleration
How to Fix P0139 2007 Nissan Maxima
- Perform a visual inspection of the oxygen sensor and its wiring for any visible damage or corrosion.
- Use a scan tool to monitor the sensor's response time and voltage output to confirm the slow response.
- Replace the downstream oxygen sensor if it is deemed faulty or slow to respond.
- Clear the DTC from the ECM's memory and perform a test drive to ensure the code does not return.
- If the issue persists, further diagnostics may be needed to check for underlying wiring or ECM problems.
Cost to Fix P0139 2007 Nissan Maxima
The typical repair costs for addressing a P0139 code on a 2007 Nissan Maxima can range from $150 to $300, including parts and labor. However, actual costs may vary depending on the specific diagnosis time and labor rates at auto repair shops. It is recommended to inquire about local rates to obtain a more accurate estimate. Additionally, factors such as the vehicle's make and model, as well as the engine type, can also influence the overall repair costs.
Tech Notes for P0139 2007 Nissan Maxima
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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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