P0138 2012 Ford Fusion Code - O2 Sensor Circuit High Voltage Bank 1 Sensor 2
Quick Answer
The heated oxygen sensor (HO2S) signals are monitored for an over voltage condition. Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 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
- P0138 2012 Ford Fusion indicates O2 Sensor Circuit High Voltage Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 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 P0138 2012 Ford Fusion Description
What are the Possible Causes of the DTC P0138 2012 Ford Fusion?
- Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Intake air leaks
- Exhaust gas leaks
- Inappropriate fuel pressure
- Faulty fuel injectors
How to Fix the DTC P0138 2012 Ford Fusion?
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0138 2012 Ford Fusion 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 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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