AutoCodes – Dodge – P2255 Dodge

P2255 Dodge 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 Dodge 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 2,833

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 Dodge 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 Dodge - O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1 - AutoCodes.com — P2255 Dodge 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 Dodge?

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 Dodge?

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 Dodge 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 Dodge Code

What does the OBDII code P2255 mean for a Dodge vehicle?

The P2255 code indicates a problem with the O2 sensor negative current control circuit for Bank 2 Sensor 1, where the signal is reading lower than expected.

What are the common symptoms of the P2255 code in a Dodge?

Common symptoms include an illuminated check engine light, reduced fuel efficiency, poor engine performance, and possibly rough idling or hesitation during acceleration.

What causes the P2255 code to appear in a Dodge?

Possible causes include a faulty O2 sensor, damaged wiring or connectors in the sensor circuit, a malfunctioning powertrain control module (PCM), or exhaust leaks near the sensor.

How do I diagnose the P2255 code in a Dodge?

Begin by scanning for codes with an OBDII scanner, inspecting the O2 sensor and its wiring for damage, testing the sensor's voltage and current, and checking for exhaust leaks or PCM issues.

Can a bad O2 sensor cause the P2255 code?

Yes, a faulty O2 sensor can cause the P2255 code, as it may fail to provide accurate readings for the negative current control circuit.

Is it safe to drive a Dodge with the P2255 code?

While the vehicle may still be drivable, driving with the P2255 code can lead to poor fuel efficiency and potential long-term engine damage if not addressed promptly.

How can the P2255 code be fixed in a Dodge?

Repairs may include replacing the faulty O2 sensor, repairing or replacing damaged wiring or connectors, addressing exhaust leaks, or reprogramming or replacing the PCM if necessary.

What tools are needed to fix the P2255 code on a Dodge?

You may need an OBDII scanner, a multimeter for testing voltage and current, basic hand tools for removing and replacing the O2 sensor, and possibly exhaust repair tools or materials.

How much does it cost to repair the P2255 code on a Dodge?

Repair costs vary, but replacing an O2 sensor typically ranges from $150 to $400, depending on parts and labor. Additional repairs, such as fixing wiring or PCM issues, may increase costs.

Can the P2255 code reappear after repairs?

Yes, if the root cause is not fully resolved or if there are additional issues, the P2255 code may return. Proper diagnosis and thorough repairs are essential.