P0139 Acura Code - Secondary Heated Oxygen Sensor 2 Slow Response
Quick Answer
The Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2)) detects the oxygen content in the exhaust gas downstream of the three-way catalytic converter (TWC) during stoichiometric air/fuel ratio feedback control. Common causes include Faulty Secondary Heated Oxygen Sensor 2, Secondary Heated Oxygen Sensor 2 harness is open or shorted, Secondary Heated Oxygen Sensor 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
- P0139 Acura indicates Secondary Heated Oxygen Sensor 2 Slow Response.
- Common causes
- Common causes include Faulty Secondary Heated Oxygen Sensor 2, Secondary Heated Oxygen Sensor 2 harness is open or shorted, Secondary Heated Oxygen Sensor 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.
Code P0139 Acura Description
What are the Possible Causes of the DTC P0139 Acura?
- Faulty Secondary Heated Oxygen Sensor 2
- Secondary Heated Oxygen Sensor 2 harness is open or shorted
- Secondary Heated Oxygen Sensor 2 circuit poor electrical connection
- Exhaust system failure (exhaust gas leak)
How to Fix the DTC P0139 Acura?
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
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0139 Acura 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 Acura Code
1. What are the common symptoms of OBDII code P0139 in an Acura?
- Common symptoms of P0139 include poor fuel efficiency, rough idle, engine misfires, and the illumination of the check engine light.
2. What does the OBDII code P0139 in an Acura indicate?
- P0139 indicates a slow response from the secondary heated oxygen sensor 2 in the vehicle's exhaust system.
3. What are the possible causes of the secondary heated oxygen sensor 2 slow response code in an Acura?
- Common causes of P0139 include a faulty oxygen sensor, wiring issues, exhaust leaks, or a malfunctioning catalytic converter.
4. How can I diagnose the cause of the P0139 code in my Acura?
- Diagnosing P0139 involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor and its wiring, checking for exhaust leaks, and testing the catalytic converter.
5. Can I continue driving my Acura with the P0139 code present?
- It is not recommended to drive your Acura with the P0139 code as it can lead to poor engine performance, decreased fuel efficiency, and potential damage to the catalytic converter.
6. How can I repair the secondary heated oxygen sensor 2 slow response code in my Acura?
- Repairing P0139 typically involves replacing the faulty oxygen sensor, repairing any damaged wiring, fixing exhaust leaks, or replacing a malfunctioning catalytic converter.
7. Is it possible to reset the P0139 code in my Acura without fixing the issue?
- While you can clear the code using an OBDII scanner, it will likely reappear if the underlying issue causing the P0139 code is not addressed.
8. How much does it cost to repair the P0139 code in an Acura?
- The cost of repairing P0139 varies depending on the specific issue, but it can range from $100 to $500 or more, including parts and labor.
9. Can a DIY enthusiast fix the P0139 code in an Acura?
- Depending on your mechanical skills and tools available, it is possible to replace the oxygen sensor or address wiring issues yourself. However, diagnosing and repairing exhaust leaks or catalytic converter problems may require professional help.
10. How often does the secondary heated oxygen sensor need to be replaced in an Acura?
- The secondary heated oxygen sensor may need replacement every 60,000 to 90,000 miles, but it can vary based on driving conditions and maintenance practices.
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