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P2240 is a diagnostic trouble code (DTC) for "O2 Sensor Positive 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 Positive Current Control Circuit/Open Bank 2 Sensor 1
P2240 is an OBD-II generic code for the engine control module (ECM) detecting the air-fuel (A/F) ratio sensor signal is shorted or between the A/F positive and negative terminals of the sensor.
The engine control module is detecting a signal is shorted or open between the bank 2 A/F sensor 1 signal wires. This can be an issue with the ECM, A/F ratio sensor, or wiring.
The Check Engine Light will be illuminated and the code is set in ECM memory as a fault.
The ECM will ignore the sensor and put the engine in failure mode for fuel control. This strategy may be different between manufactures therefore the drive symptoms may be different. You may have surging, bucking or jerking, misfires, low power, pinging, or other symptoms.
Scans and documents the codes in the ECM and looks at the freeze frame data for failure
Checks for any problem with the wiring or connector to the sensor
Checks the data to see if the sensor is shorted or open
Disconnects the sensor to see if the short goes away, indicating a shorted sensor
Checks the connector for corrosion that can cause an open in the sensor circuit
Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired
Failing to clear the ECM codes after the codes are fixed
Failing to check and clean the connector for corrosion before replacing the sensor, the connection may only be okay for a short time before the code returns
Code P2240 is an indication that the ECM is getting a signal from the air-fuel ratio sensor that it may be shorted or open. The ECM cannot control the fuel properly until the signal is fixed. You may have poor fuel mileage and various poor drive symptoms.
Code P2240 is for one of the A/F sensors and may be accompanied by other engine codes. Some vehicles may have computer software issues pertaining to this code and may need ECM reprogramming. Check for technical bulletins for your application before attempting repairs.
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.