P0139 Ford Code - O2 Sensor Circuit Slow Response Bank 1 Sensor 2
Quick Answer
The P0139 code for Ford vehicles indicates that there is a slow response from the O2 sensor in the second bank of the engine. Common causes include Faulty O2 sensor, Wiring 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 Ford indicates O2 Sensor Circuit Slow Response Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty O2 sensor, Wiring 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 Ford Description
The P0139 code for Ford vehicles indicates that there is a slow response from the O2 sensor in the second bank of the engine. The O2 sensor is responsible for monitoring the oxygen levels in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. When the sensor responds slowly or inaccurately, it can lead to poor engine performance, decreased fuel efficiency, and increased emissions.
Common Causes of P0139 Ford
- Faulty O2 sensor
- Wiring issues
- Exhaust leaks
- Engine problems
- ECM malfunction
Symptoms of P0139 Ford
- Rough idling
- Hesitation during acceleration
- Decreased fuel efficiency
- Engine stalling
- Check Engine Light illuminated
How to Fix P0139 Ford
- Diagnose the root cause by performing a thorough inspection of the O2 sensor, wiring, and exhaust system.
- Replace the faulty O2 sensor if it is determined to be the cause of the slow response.
- Repair any wiring issues or exhaust leaks that may be affecting the sensor's performance.
- Clear the error code from the ECM and reset the system to see if the issue has been resolved.
- Test drive the vehicle to ensure that the O2 sensor is responding correctly and that the symptoms have been eliminated.
Cost to Fix P0139 Ford
The cost of repairing the O2 sensor circuit slow response (P0139) code for a Ford vehicle can vary depending on the specific model, the location of the repair shop, and the extent of the issue. On average, the repair cost can range from $150 to $400, including parts and labor. However, it's essential to check with local auto repair shops for more accurate pricing, as rates can differ significantly. Keep in mind that diagnosis time and labor rates can also affect the overall cost of the repair.
Tech Notes for P0139 Ford
When is the Code Detected?
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Information for Specific Ford Models
- P0139 2006 Ford Fusion — O2 Sensor Circuit Slow Response Bank 1 Sensor 2
- P0139 2007 Ford Fusion — O2 Sensor Circuit Slow Response Bank 1 Sensor 2
- P0139 2008 Ford Fusion — O2 Sensor Circuit Slow Response Bank 1 Sensor 2
- P0139 2009 Ford Fusion — O2 Sensor Circuit Slow Response Bank 1 Sensor 2
- P0139 2010 Ford Fusion — O2 Sensor Circuit Slow Response Bank 1 Sensor 2
- P0139 2011 Ford Fusion — O2 Sensor Circuit Slow Response Bank 1 Sensor 2
- P0139 2012 Ford Fusion — O2 Sensor Circuit Slow Response Bank 1 Sensor 2
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