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P2626 is a diagnostic trouble code (DTC) for "O2 Sensor Pumping Current Trim Circuit/Open 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.
The P2626 code is a generic powertrain code related to computer circuit output issues. This code appears when the engine control module (ECM) has received a voltage signal from oxygen sensor number 1 pumping current trim circuit for bank 1 that is not within the accepted variances. This typically means the engine block contained the number 1 cylinder is impacted and a fault has been found in the sensor ahead of the catalytic converter (upstream sensor or sensor 1).
The P2626 code is related to:
If a P2626 code appears, your vehicle’s ECM has received a voltage signal from oxygen sensor number 1 pumping current trim circuit for bank 1 that is not within the accepted variances. This typically means the engine block contained the number 1 cylinder is impacted and a fault has been found in the sensor ahead of the catalytic converter (upstream sensor or sensor 1). After reaching normal operating temperature and the ECM reaches closed-loop operations, upstream heater oxygen sensor readings should vary consistently from 100 to 900 millivolts.
It could also be due to an oxygen sensor reading being lower than allowed variances. When the voltage signal variance exceeds 10%, either high or low, the ECM will store a P2626 code. The ECM uses the signals from the oxygen sensor to monitor if the air and fuel mixture is too rich or too lean and increases or decreases the fuel injection duration. A damaged sensor can cause the air/fuel mixture to be too rich or too lean for the engine’s needs.
The P2626 code is caused by a number of possible issues, including:
The symptoms of a P2626 code may include:
A mechanic may use a variety of methods to diagnose a P2626 code, including:
One common mistake when diagnosing the P2626 code is replacement of the incorrect sensor. Additionally, overlooking and not repairing or replacing damaged wires can result in multiple replacements of the oxygen sensor or related parts. Finally, replacing the oxygen sensor when lean or rich air/fuel mixtures are the actual reason for the code.
Because a P2626 code stored in your ECM could result in your vehicle stalling or hesitating during acceleration, causing dangerous driving conditions, YourMechanic considers this a potentially serious issue. Take your vehicle into your local dealer service center of repair shop for diagnosis and repair immediately.
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.