P0138 2007 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 2007 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 2007 Ford Fusion Description
What are the Possible Causes of the DTC P0138 2007 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 2007 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 2007 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 2007 Ford Fusion Code
1. What does OBDII code P0138 mean on a 2007 Ford Fusion?
- OBDII code P0138 for a 2007 Ford Fusion indicates a high voltage in the O2 sensor circuit of Bank 1 Sensor 2, also known as the downstream oxygen sensor.
2. What are the common symptoms of O2 Sensor Circuit High Voltage Bank 1 Sensor 2 (P0138) in a 2007 Ford Fusion?
- Common symptoms of P0138 in a 2007 Ford Fusion include poor fuel efficiency, rough idling, engine hesitation, or an illuminated check engine light.
3. What are the possible causes of O2 Sensor Circuit High Voltage Bank 1 Sensor 2 (P0138) in a 2007 Ford Fusion?
- Causes of P0138 in a 2007 Ford Fusion can include a faulty oxygen sensor, wiring issues in the O2 sensor circuit, exhaust leaks, or a failed PCM (powertrain control module).
4. How can I diagnose O2 Sensor Circuit High Voltage Bank 1 Sensor 2 (P0138) in my 2007 Ford Fusion?
- Diagnosing P0138 in a 2007 Ford Fusion involves using a scan tool to monitor O2 sensor data, checking for wiring faults, inspecting the sensor for damage, and testing the sensor's voltage output.
5. Can I continue driving my 2007 Ford Fusion with OBDII code P0138 (O2 Sensor Circuit High Voltage Bank 1 Sensor 2)?
- It's not recommended to drive your 2007 Ford Fusion with P0138 for an extended period, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.
6. How do I repair O2 Sensor Circuit High Voltage Bank 1 Sensor 2 (P0138) in a 2007 Ford Fusion?
- Repairing P0138 in a 2007 Ford Fusion typically involves replacing the Bank 1 Sensor 2 oxygen sensor, repairing any wiring issues, and clearing the trouble code with a scan tool.
7. Is it possible to reset the OBDII code P0138 in a 2007 Ford Fusion without repairing the issue?
- While you can clear the P0138 trouble code with a scan tool, it's essential to address the underlying problem to prevent further issues and potential damage to the vehicle.
8. How much does it cost to fix O2 Sensor Circuit High Voltage Bank 1 Sensor 2 (P0138) in a 2007 Ford Fusion?
- The cost of fixing P0138 in a 2007 Ford Fusion varies depending on the cause of the issue, but it typically ranges from $200 to $500, including parts and labor.
9. Can a DIY enthusiast replace the O2 sensor for P0138 in a 2007 Ford Fusion?
- Yes, replacing the O2 sensor for P0138 in a 2007 Ford Fusion is a task that DIY enthusiasts can typically handle with basic tools and some mechanical knowledge.
10. Will resetting the check engine light solve the issue of O2 Sensor Circuit High Voltage Bank 1 Sensor 2 (P0138) in a 2007 Ford Fusion?
- Resetting the check engine light without addressing the underlying problem causing P0138 in a 2007 Ford Fusion will not solve the issue; the problem must be diagnosed and repaired.
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