P0138 2010 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 2010 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 2010 Ford Fusion Description
What are the Possible Causes of the DTC P0138 2010 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 2010 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 2010 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 2010 Ford Fusion Code
What does the OBDII code P0138 mean for a 2010 Ford Fusion?
The code P0138 indicates that the O2 sensor circuit for Bank 1 Sensor 2 is reporting a high voltage, which suggests that the sensor may be malfunctioning or there may be an issue with the wiring or connectors.
What are the common symptoms of the P0138 code in a 2010 Ford Fusion?
Common symptoms include poor fuel economy, rough idling, increased emissions, and the check engine light being illuminated on the dashboard.
What could cause the P0138 code to trigger in a 2010 Ford Fusion?
Possible causes include a faulty O2 sensor, damaged wiring or connectors, exhaust leaks, or issues with the engine control module (ECM).
How can I diagnose the P0138 code properly?
To diagnose the P0138 code, start with a visual inspection of the O2 sensor and its wiring. Use a multimeter to check the voltage output of the sensor, and verify that there are no exhaust leaks or issues with the ECM.
What is the recommended repair for a P0138 code?
The recommended repair often involves replacing the faulty O2 sensor for Bank 1 Sensor 2. Additionally, check and repair any damaged wiring or connectors.
Can I drive my 2010 Ford Fusion with the P0138 code?
While it may be possible to drive your vehicle, it is not advisable as it can lead to poor performance, reduced fuel efficiency, and increased emissions. It's best to address the issue promptly.
How do I reset the check engine light after fixing the P0138 code?
You can reset the check engine light by using an OBDII scanner to clear the code after making the necessary repairs. Alternatively, disconnecting the battery for a few minutes may also reset the light.
Will replacing the O2 sensor always fix the P0138 code?
Not necessarily. While replacing the O2 sensor is a common fix, if the code persists, further diagnostics may be needed to check for wiring issues, exhaust leaks, or problems with the ECM.
How much does it typically cost to repair the P0138 code?
Repair costs can vary widely, but replacing an O2 sensor typically ranges from $100 to $300, depending on parts and labor. Additional repairs for wiring or exhaust issues may increase total costs.
Discuss the causes and fixes for P0138 2010 Ford Fusion OBDII Code
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