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P2237 Diagnostic Trouble Code Discussion for February 2014

Air Fuel Sensor 1 (Bank 1 Sensor 1) Pumping Current Signal Open

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Trouble Ticket Help Requests for DTC P2237
Help Request Posted
2008 Toyota Avalon XLS 3.5L MIL Lamp on VIN: 4T1BK36B88
P2237: a/f pumping circuit open. Kind of a strange problem with this car as codes will set but freeze frame always shows fuel trims are within zero to three of perfect at time of failure, car runs very good and is smooth. Find no vacume leaks and only shows bank 1 as a problem but fuel trims ...
February 25, 2014