P0138 2012 Ford Fusion Code - O2 Sensor Circuit High Voltage Bank 1 Sensor 2
Quick Answer
The P0138 diagnostic trouble code (DTC) for a 2012 Ford Fusion indicates an issue with the O2 sensor circuit high voltage for 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 2012 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 2012 Ford Fusion Description
The P0138 diagnostic trouble code (DTC) for a 2012 Ford Fusion indicates an issue with the O2 sensor circuit high voltage for 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 2012 Ford Fusion
- Faulty O2 sensor
- Wiring or connector issues in the O2 sensor circuit
- Exhaust leaks near the O2 sensor
- Engine running rich due to a fuel system issue
- ECM software malfunction
Symptoms of P0138 2012 Ford Fusion
- Decreased fuel efficiency
- Rough idling or stalling
- Check Engine Light illuminated
- Poor acceleration
- Increased emissions
How to Fix P0138 2012 Ford Fusion
- Begin by locating the Bank 1 Sensor 2 O2 sensor, typically found after the catalytic converter.
- Inspect the wiring and connectors for any damage or corrosion. Repair or replace as necessary.
- Test the O2 sensor using a multimeter to check for proper voltage output. Replace the sensor if it is faulty.
- Clear the DTC with a scan tool and test drive the vehicle to ensure the issue has been resolved.
- If the code persists, further diagnostics may be needed to identify any underlying issues.
Cost to Fix P0138 2012 Ford Fusion
The cost of repairing a P0138 code on a 2012 Ford Fusion can vary depending on the specific cause of the issue. On average, the cost of replacing an O2 sensor can range from $150 to $300, including parts and labor. Additional costs may apply if wiring or connectors need to be repaired or replaced. It is recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle. Keep in mind that labor rates can vary, so it's advisable to inquire about rates in your local area.
Tech Notes for P0138 2012 Ford Fusion
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Frequently Asked Questions about P0138 2012 Ford Fusion Code
1. What does OBDII code P0138 on a 2012 Ford Fusion indicate?
- OBDII code P0138 in a 2012 Ford Fusion means there is a high voltage condition in the O2 sensor circuit of Bank 1 Sensor 2.
2. What are the common symptoms of OBDII code P0138 in a 2012 Ford Fusion?
- Common symptoms include decreased fuel efficiency, rough idling, engine misfires, and the illumination of the Check Engine light.
3. What are the possible causes of O2 Sensor Circuit High Voltage Bank 1 Sensor 2 in a 2012 Ford Fusion?
- The causes may include a faulty O2 sensor, damaged wiring or connectors in the O2 sensor circuit, an exhaust leak, or issues with the engine's fuel system.
4. How can I diagnose OBDII code P0138 on my 2012 Ford Fusion?
- Diagnosis involves using an OBDII scanner to retrieve the code, inspecting the O2 sensor and its wiring, checking for exhaust leaks, and testing the sensor's voltage output.
5. Can I continue driving my 2012 Ford Fusion with OBDII code P0138?
- It is not recommended to drive for an extended period with this code, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.
6. What are the repair options for O2 Sensor Circuit High Voltage Bank 1 Sensor 2 in a 2012 Ford Fusion?
- Repair options may include replacing the faulty O2 sensor, repairing damaged wiring or connectors, fixing any exhaust leaks, or addressing issues with the fuel system.
7. How much does it typically cost to fix OBDII code P0138 on a 2012 Ford Fusion?
- The cost can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.
8. Can I reset the Check Engine light after fixing OBDII code P0138 on my 2012 Ford Fusion?
- Yes, you can reset the Check Engine light using an OBDII scanner after the issue has been successfully repaired.
9. How often should I replace the O2 sensors in my 2012 Ford Fusion to prevent OBDII code P0138?
- O2 sensors typically last around 100,000 miles, but it's recommended to follow the manufacturer's maintenance schedule for specific guidance on replacement intervals.
10. Are there any DIY tips for troubleshooting O2 Sensor Circuit High Voltage Bank 1 Sensor 2 in a 2012 Ford Fusion?
- DIY tips may include visually inspecting the O2 sensor and its wiring, checking for loose connections, and ensuring the sensor is receiving proper voltage from the engine control module.
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