AutoCodes – Ford – P2255 Ford

P2255 Ford Code - O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1

Quick Answer

The Front Oxygen Sensor (O2 Sensor 1) is placed into the exhaust manifold. Common causes include Faulty Front Oxygen Sensor Bank 2, Front Oxygen Sensor Bank 2 harness is open or shorted, Front Oxygen Sensor Bank 2 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: P2255 Ford indicates O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1.
Common causes: Common causes include Faulty Front Oxygen Sensor Bank 2, Front Oxygen Sensor Bank 2 harness is open or shorted, Front Oxygen Sensor Bank 2 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 1,462

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2255 Ford Description

The Front Oxygen Sensor (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 P2255 Ford - O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1 - AutoCodes.com — P2255 Ford Code - O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P2255 Ford?

Faulty Front Oxygen Sensor Bank 2
Front Oxygen Sensor Bank 2 harness is open or shorted
Front Oxygen Sensor Bank 2 circuit poor electrical connection

How to Fix the DTC P2255 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 P2255 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.

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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 P2255 Ford Code

1. What does the OBDII code P2255 Ford mean?

The code P2255 Ford indicates an issue with the O2 Sensor Negative Current Control Circuit Low on Bank 2 Sensor 1.

2. What are the common symptoms of the P2255 Ford code?

Common symptoms of the P2255 Ford code include poor engine performance, decreased fuel efficiency, and the illumination of the Check Engine Light.

3. What are the possible causes of the P2255 Ford code?

Potential causes of the P2255 Ford code include a faulty oxygen sensor, damaged wiring or connectors, a vacuum leak, or a problem with the engine's air-fuel ratio.

4. How do I diagnose the P2255 Ford code?

Diagnosing the P2255 Ford code involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor and related components, and testing the wiring and connectors for any issues.

5. Can I continue driving with the P2255 Ford code?

It is not recommended to drive with the P2255 Ford code, as it can lead to further engine damage and decreased fuel efficiency. It's best to address the issue promptly.

6. How can I repair the P2255 Ford code?

To repair the P2255 Ford code, you may need to replace the oxygen sensor, repair or replace damaged wiring, fix any vacuum leaks, or address any issues affecting the air-fuel ratio.

7. Are there any DIY tips for fixing the P2255 Ford code?

While some aspects of diagnosing and repairing the P2255 Ford code may be DIY-friendly, it's recommended to consult a professional mechanic for an accurate diagnosis and proper repair.

8. How much does it cost to fix the P2255 Ford code?

The cost of fixing the P2255 Ford code can vary depending on the underlying issue, the labor rates in your area, and whether you choose to repair it yourself or seek professional help.

9. Can a bad O2 sensor cause the P2255 Ford code?

Yes, a faulty oxygen sensor can trigger the P2255 Ford code, as it plays a crucial role in monitoring the air-fuel mixture and emissions in the engine.

10. How often should I check my O2 sensors to prevent the P2255 Ford code?

It's recommended to include O2 sensor checks as part of your regular vehicle maintenance routine, especially during scheduled tune-ups or when experiencing symptoms of poor engine performance.