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P2254 is a diagnostic trouble code (DTC) for "O2 Sensor Negative Current Control Circuit/Open Bank 2 Sensor 1". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
O2 sensor negative current control circuit/open bank 2 sensor 1
This trouble code indicates that the powertrain control module has detected a reference voltage from the O2 sensor that is upstream on the second bank of the exhaust that is not within the range of acceptance set by the vehicle’s manufacturer.
Some of the potential causes of this trouble code may include:
Some of the symptoms of this trouble code that the driver may experience would include:
The engine may run rich or lean depending on the direction of variation in the reference voltage (up or down).
The fuel economy of the vehicle may be decreased.
The Check Engine Light will likely be illuminated.
A mechanic may diagnose this trouble code by first getting under the vehicle and inspecting the oxygen sensors for damage. This would also include checking the wiring and connectors that are associated with the oxygen sensor for damage as well. If no damage to the sensor or its circuitry are found, the mechanic would then test the sensor with a digital multimeter using the manufacturer’s recommended procedure. If the oxygen sensor tests good, the mechanic would then do a fuel pressure test and a vacuum test to determine whether or not these numbers are within specification. If these numbers are within specification, the powertrain control module would be tested with a high tech scan tool for proper function. If any issues arise during the diagnosis of this issue, they should be resolved before any further diagnosis takes place.
A common mistake that could be made when diagnosing this trouble code would be to replace the oxygen sensor without doing any proper testing. Although the oxygen sensor failure is one of the most common causes of this trouble code, it is not the only cause. Therefore, the entire diagnostic procedure should be carried out in order to prevent a misdiagnosis as well as wasted time and money.
This trouble code would rank somewhere in the middle of the seriousness scale. Although no major driveability issues will occur, this trouble code can decrease the gas mileage of any vehicle that has it stored. With this being considered it would be wise to have the issue diagnosed and repaired at the earliest possible opportunity.
Repairs that can potentially resolve the issues that are caused by this trouble code may include:
Replacing the oxygen sensor that is upstream on the second bank of exhaust
Repairing or replacing the wiring or connectors that are associated with the oxygen sensor
Resolving a fuel pressure issue
Repairing a vacuum leak
Replacing the powertrain control module
It is possible that other codes related to the upstream oxygen sensor on bank 2 may be stored in addition to this trouble code. If this is the case, it is more likely that the oxygen sensor has failed. All relevant diagnostic procedures should still be carried out in the event that other codes exist.
YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220