O2 Sensor Negative Current Control Circuit Low Bank 2 Sensor 1

Table of contents

P2255 ACURA Possible Causes

  • 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 do I fix code P2255 ACURA?

  Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.

Cost of diagnosing the P2255 ACURA code

  The cost of diagnosing the P2255 ACURA code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

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.


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