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P2239 is a diagnostic trouble code (DTC) for "O2 Sensor Positive Current Control Circuit High Bank 1 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 Positive Current Control Circuit High Bank 1 Sensor 1
This trouble code indicates that the powertrain control module has detected a voltage from the O2 sensor positive current control circuit that is higher than the range of acceptance set by the vehicle manufacturer.
Some of the potential causes of of this trouble code may include:
Some of the symptoms of this trouble code that the driver may experience would include:
A mechanic may diagnose this trouble code by first locating and inspecting the oxygen sensor that is upstream and on bank 1. This would also include an inspection of the wiring and connector that are associated with the oxygen sensor for damage. After these two things have been inspected and the issue is still not found, the mechanic would then test fuel pressure and vacuum readings using specialized tools to do so. After these readings have come back within specification and the problem still exists, the mechanic would finally test the powertrain control module for proper function using a high tech scan tool. After all tests have been performed, the mechanic would relay their findings over to the customer to make a repair decision.
A common mistake that could be made when diagnosing this trouble code would be to replace the oxygen sensor without considering any other possible causes of the issue. Oxygen sensors are often replaced in vein due to the fact that they are mentioned in the trouble code definition.
This trouble code would be considered moderately serious. This is due to the fact that it does not cause any driveability issues but can still affect your vehicle's fuel efficiency. Having this trouble code stored can cost you more money at the gas pump which will make most want to have the issue resolved as soon as possible.
Repairs that can potentially fix issues caused by this trouble code would include:
Even though this code will not cause major damage to your vehicle right away, lean or rich conditions can eventually cause damage to the catalytic converters. This can be a very costly repair and can be completely avoided if this code is diagnosed and repaired in a timely manner.
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 1-800-701-6230