P0138 2009 Ford Fusion Code - O2 Sensor Circuit High Voltage Bank 1 Sensor 2
Quick Answer
The P0138 diagnostic trouble code (DTC) for a 2009 Ford Fusion indicates an issue with the O2 sensor circuit having high voltage on Bank 1 Sensor 2. Common causes include Faulty O2 sensor, Wiring or connector issues in the O2 sensor circuit, Exhaust leaks near the O2 sensor. 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
- P0138 2009 Ford Fusion indicates O2 Sensor Circuit High Voltage Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty O2 sensor, Wiring or connector issues in the O2 sensor circuit, Exhaust leaks near the O2 sensor.
- 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 P0138 2009 Ford Fusion Description
The P0138 diagnostic trouble code (DTC) for a 2009 Ford Fusion indicates an issue with the O2 sensor circuit having high voltage on Bank 1 Sensor 2. The O2 sensor, also known as the oxygen sensor, plays a crucial role in monitoring the oxygen levels in the exhaust gases. Bank 1 refers to the side of the engine where the number 1 cylinder is located, while Sensor 2 indicates that it is the downstream sensor located after the catalytic converter.
Common Causes of P0138 2009 Ford Fusion
- Faulty O2 sensor
- Wiring or connector issues in the O2 sensor circuit
- Exhaust leaks near the O2 sensor
- Engine running rich (excess fuel)
- Malfunctioning ECM
Symptoms of P0138 2009 Ford Fusion
- Decreased fuel efficiency
- Rough idling or engine misfires
- Check Engine Light illuminated
- Poor acceleration or lack of power
- Increased emissions
How to Fix P0138 2009 Ford Fusion
- Diagnose the issue by using a scan tool to read the DTC and monitor the O2 sensor's voltage readings.
- Inspect the wiring and connectors for any damage or corrosion. Repair or replace as necessary.
- Check for exhaust leaks near the O2 sensor and fix them.
- Replace the Bank 1 Sensor 2 O2 sensor if it is determined to be faulty.
- Clear the DTC and perform a test drive to ensure the issue has been resolved.
Cost to Fix P0138 2009 Ford Fusion
The cost of repairing a P0138 code on a 2009 Ford Fusion can vary depending on the cause of the issue and the specific parts needed. On average, replacing an O2 sensor can cost between $100 to $300 for the part alone. Labor costs can range from $80 to $150 per hour, and the total repair bill may amount to $200 to $500 or more. It's recommended to consult with a trusted mechanic or auto repair shop to get an accurate estimate based on your location and vehicle specifics.
Tech Notes for P0138 2009 Ford Fusion
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Frequently Asked Questions about P0138 2009 Ford Fusion Code
1. What does the OBDII code P0138 for a 2009 Ford Fusion mean?
The code P0138 indicates a high voltage condition in the O2 sensor circuit of Bank 1 Sensor 2 in the exhaust system of the vehicle.
2. What are common symptoms of a P0138 OBDII code in a 2009 Ford Fusion?
Common symptoms of a P0138 code may include poor fuel economy, rough idling, engine misfires, and the illumination of the check engine light on the dashboard.
3. What are possible causes of a P0138 code in a 2009 Ford Fusion?
Possible causes of a P0138 code include a faulty O2 sensor, damaged wiring or connectors in the O2 sensor circuit, exhaust leaks, or issues with the engine's fuel system.
4. How serious is a P0138 OBDII code in a 2009 Ford Fusion?
While a P0138 code may not cause immediate harm to the vehicle, it can lead to decreased fuel efficiency and performance if left unaddressed. It is recommended to diagnose and repair the issue promptly.
5. How can I diagnose a P0138 code in my 2009 Ford Fusion?
Diagnosing a P0138 code involves using an OBDII scanner to retrieve the code, inspecting the O2 sensor and its wiring for damage, checking for exhaust leaks, and testing the sensor's voltage output.
6. Can I drive my 2009 Ford Fusion with a P0138 code?
It is generally safe to drive the vehicle with a P0138 code, but it is advisable to address the issue as soon as possible to prevent potential damage to the engine and to maintain optimal performance.
7. How can I repair a P0138 code in my 2009 Ford Fusion?
Repairing a P0138 code may involve replacing the Bank 1 Sensor 2 O2 sensor, repairing damaged wiring or connectors, fixing exhaust leaks, and clearing the code using an OBDII scanner.
8. Will resetting the check engine light fix a P0138 code in a 2009 Ford Fusion?
Resetting the check engine light may temporarily clear the code, but it will not fix the underlying issue causing the P0138 code. It is important to diagnose and repair the problem to prevent the code from reappearing.
9. Can a P0138 code in a 2009 Ford Fusion cause emissions test failure?
A P0138 code can potentially cause your vehicle to fail an emissions test due to the high voltage condition in the O2 sensor circuit. It is recommended to address the issue before undergoing an emissions test.
10. How much does it cost to repair a P0138 OBDII code in a 2009 Ford Fusion?
The cost of repairing a P0138 code can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor, including the replacement of the O2 sensor if necessary.
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