P2254 Fault Code

O2 Sensor Negative Current Control Circuit/Open Bank 2 Sensor 1

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2254 code indicates a problem with the oxygen sensor (O2 sensor) located on Bank 2, Sensor 1. This code is triggered when the Engine Control Module (ECM) detects an issue related to the negative current control circuit for this specific O2 sensor. The primary role of this sensor is to monitor the level of oxygen in the exhaust gases, helping the engine to maintain optimal air-fuel ratios for efficient combustion.

What are the symptoms of the P2254 code?

Common symptoms that may indicate a P2254 code include:

• Check Engine Light illuminated on the dashboard.
• Poor fuel economy due to incorrect air-fuel mixture settings.
• Increased emissions during testing or inspection.
• Rough idling or engine stalling due to improper fuel mixture.

What causes the P2254 code?

Several factors can lead to the P2254 code including:

• Damaged or corroded O2 sensor wiring and connectors.
• A faulty O2 sensor that fails to perform correctly.
• Issues with the ECM or its software.
• Short circuits in the wiring harness associated with the sensor.
• Exhaust leaks that can affect sensor readings.

How to fix P2254?

To resolve the P2254 code, you can follow these steps:

• Inspect the O2 sensor wiring and connectors for any visible damage or corrosion.
• Test the O2 sensor using a multimeter to ensure it is functioning correctly; replace if faulty.
• Check for exhaust leaks that may interfere with sensor operation and repair as necessary.
• Clear the code from the ECM and perform a test drive to ensure that the problem does not recur.