AutoCodes – Acura – P2255 Acura

P2255 Acura 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 Acura 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 1,426

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

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 Acura?

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 Acura 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 Acura Code

1. What does the OBDII code P2255 mean on an Acura?

P2255 refers to an issue with the O2 Sensor Negative Current Control Circuit Low for Bank 2 Sensor 1, indicating the sensor is detecting a low voltage or current in the circuit.

2. What are the common symptoms of code P2255 in an Acura?

Symptoms include poor fuel economy, rough idling, engine performance issues, and the illumination of the check engine light.

3. What causes the P2255 code in an Acura?

Common causes are a faulty oxygen sensor, damaged wiring or connectors, a defective PCM (Powertrain Control Module), or an exhaust leak near the sensor.

4. Which sensor is affected by the P2255 code?

The code specifically affects Bank 2 Sensor 1, which is the upstream oxygen sensor on the side of the engine with cylinder 2.

5. How do you diagnose code P2255 on an Acura?

Diagnosis involves checking the sensorâ€™s wiring and connectors for damage, using a multimeter to test the sensor's voltage and current, and verifying the PCM operation.

6. Can I drive my Acura with a P2255 code?

While you can drive with this code, it is not recommended as it can lead to poor fuel efficiency, engine damage, and higher emissions.

7. How is the P2255 code fixed on an Acura?

Repairs may include replacing the oxygen sensor, repairing or replacing damaged wiring, addressing exhaust leaks, or reprogramming/repairing the PCM.

8. How much does it cost to fix the P2255 code on an Acura?

The cost varies, but replacing an oxygen sensor typically ranges from $150 to $400, while wiring repairs or PCM replacement can be more expensive.

9. Can a dirty air filter trigger the P2255 code on an Acura?

A dirty air filter is unlikely to directly cause this code but can indirectly affect engine performance and emissions, possibly leading to sensor issues.

10. Will clearing the code fix the P2255 issue on my Acura?

Clearing the code may temporarily turn off the check engine light but wonâ€™t resolve the underlying issue causing the code. Proper diagnostics and repairs are necessary.