AutoCodes – Ford – P2238 Ford

P2238 Ford Code - O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1

Quick Answer

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. Common causes include Faulty Front Heated Oxygen Sensor Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front 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
P2238 Ford indicates O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1.
Common causes
Common causes include Faulty Front Heated Oxygen Sensor Bank 1, Front Heated Oxygen Sensor Bank 1 harness is open or shorted, Front 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.
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Code Popularity 2,828
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P2238 Ford Description

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.
OBDII Code P2238 Ford - O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1 - AutoCodes.com
P2238 Ford Code - O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1

What are the Possible Causes of the DTC P2238 Ford?

  • Faulty Front Heated Oxygen Sensor Bank 1
  • Front Heated Oxygen Sensor Bank 1 harness is open or shorted
  • Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection

How to Fix the DTC P2238 Ford?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2238 Ford 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.

Need more information about the P2238 Ford code?

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Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2238 Ford Code

1. What are common symptoms of OBDII code P2238 in a Ford vehicle?

- Common symptoms include decreased fuel efficiency, rough idling, and the illumination of the check engine light.

2. What does the O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1 error code mean in a Ford?

- This code indicates that there is a low voltage condition in the positive current control circuit of the Bank 1 Sensor 1 oxygen sensor.

3. What are possible causes of the P2238 error code in a Ford?

- Possible causes include a faulty oxygen sensor, wiring issues, a poor electrical connection, or a malfunctioning engine control module (ECM).

4. How can I diagnose the O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1 issue in my Ford?

- Diagnose the issue by checking the oxygen sensor's wiring, connectors, and voltage levels using a multimeter.

5. Can I continue driving my Ford with the P2238 trouble code?

- It is generally not recommended to drive with this code present, as it can lead to decreased performance and potential damage to the vehicle over time.

6. What are the repair options for fixing OBDII code P2238 in a Ford?

- Repair options include replacing the Bank 1 Sensor 1 oxygen sensor, repairing any damaged wiring or connectors, and resetting the error code.

7. How much does it typically cost to repair O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1 in a Ford?

- The cost of repair can vary depending on the extent of the issue, but it may range from $100 to $300 for parts and labor.

8. Are there any DIY tips for addressing the P2238 error code in my Ford?

- DIY tips include checking and cleaning the oxygen sensor connectors, inspecting the wiring for damage, and ensuring proper voltage levels.

9. Will resetting the OBDII code P2238 in my Ford make the issue go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear.

10. How important is it to address the O2 Sensor Positive Current Control Circuit Low Bank 1 Sensor 1 problem in a Ford promptly?

- It is important to address this issue promptly to maintain optimal engine performance, fuel efficiency, and overall vehicle health.

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