P0139 2007 Ford Fusion Code - O2 Sensor Circuit Slow Response Bank 1 Sensor 2
Quick Answer
The P0139 code for a 2007 Ford Fusion indicates a potential issue with the Oxygen (O2) sensor circuit for Bank 1 Sensor 2. Common causes include Faulty O2 sensor, Damaged wiring or connectors in the sensor circuit, ECM malfunction. 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 Ford Fusion indicates O2 Sensor Circuit Slow Response Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty O2 sensor, Damaged wiring or connectors in the sensor circuit, ECM malfunction.
- 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 Ford Fusion Description
The P0139 code for a 2007 Ford Fusion indicates a potential issue with the Oxygen (O2) sensor circuit for Bank 1 Sensor 2. This sensor is responsible for monitoring the oxygen levels in the exhaust gases after they have passed through the catalytic converter. The slow response detected by the vehicle's onboard diagnostic system suggests that the sensor is not reacting as quickly as it should, which can lead to inaccurate readings being sent to the engine control module (ECM).
Common Causes of P0139 2007 Ford Fusion
- Faulty O2 sensor
- Damaged wiring or connectors in the sensor circuit
- ECM malfunction
- Exhaust leaks
- Contaminated sensor
Symptoms of P0139 2007 Ford Fusion
- Decreased fuel efficiency
- Increased emissions
- Engine hesitation or misfires
- Illuminated Check Engine Light
- Rough idling or stalling
How to Fix P0139 2007 Ford Fusion
- Use a diagnostic scanner to retrieve the specific fault code and confirm the issue.
- Inspect the wiring and connectors in the O2 sensor circuit for any damage or corrosion.
- Test the O2 sensor using a multimeter to check for proper function.
- Replace the O2 sensor if it is found to be faulty or damaged.
- Clear the fault code and perform a test drive to ensure the issue has been resolved.
Cost to Fix P0139 2007 Ford Fusion
The cost of repairing a P0139 code on a 2007 Ford Fusion can vary depending on the specific cause of the issue. On average, the cost of replacing an O2 sensor ranges from $100 to $250, including parts and labor. Additional costs may apply if wiring or connectors need to be repaired or replaced. It's important to factor in diagnostic time and labor rates, which can vary between auto repair shops. It's recommended to consult with a professional mechanic for a more accurate cost estimate based on the specific circumstances of your vehicle.
Tech Notes for P0139 2007 Ford Fusion
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Frequently Asked Questions about P0139 2007 Ford Fusion Code
1. What are the common symptoms of OBDII code P0139 in a 2007 Ford Fusion?
- Common symptoms include poor fuel economy, rough idling, hesitation during acceleration, and the illumination of the Check Engine Light.
2. What does the O2 Sensor Circuit Slow Response Bank 1 Sensor 2 mean in relation to P0139 on a 2007 Ford Fusion?
- This code indicates that the downstream oxygen sensor in Bank 1 is taking too long to respond to changes in the exhaust oxygen levels.
3. What are the possible causes of OBDII code P0139 on a 2007 Ford Fusion?
- The common causes include a faulty downstream oxygen sensor, wiring issues in the oxygen sensor circuit, exhaust leaks, or a malfunctioning catalytic converter.
4. How can I diagnose the O2 Sensor Circuit Slow Response Bank 1 Sensor 2 issue in my 2007 Ford Fusion?
- Diagnosing this issue requires using a scan tool to monitor the downstream oxygen sensor's response time and checking the wiring connections for any damage or corrosion.
5. Can I drive my 2007 Ford Fusion with an OBDII code P0139?
- It is not recommended to drive with this code as it can lead to poor engine performance and potentially cause damage to the catalytic converter over time.
6. What is the typical repair cost for fixing OBDII code P0139 on a 2007 Ford Fusion?
- The repair cost can vary depending on the exact cause of the issue, but it typically ranges from $150 to $400, including parts and labor.
7. How do I reset the Check Engine Light after repairing the O2 Sensor Circuit Slow Response Bank 1 Sensor 2 on my 2007 Ford Fusion?
- You can reset the Check Engine Light using an OBDII scanner or by disconnecting the car's battery for a few minutes to clear the error code.
8. Can I replace the downstream oxygen sensor in my 2007 Ford Fusion myself to fix code P0139?
- Yes, replacing the downstream oxygen sensor is a straightforward task that can be done with basic tools, but ensure you have the correct sensor for your vehicle.
9. Will code P0139 cause my 2007 Ford Fusion to fail an emissions test?
- Yes, having an unresolved P0139 code can cause your vehicle to fail an emissions test due to increased emissions and improper oxygen sensor functionality.
10. How often should I replace the downstream oxygen sensor in my 2007 Ford Fusion to prevent O2 sensor circuit slow response issues?
- The downstream oxygen sensor typically lasts around 60,000 to 90,000 miles, but it's recommended to follow the manufacturer's maintenance schedule for optimal performance and emissions compliance.
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