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Q: getting code for catalytic converter saying low threshold bank 1. how do I tell on 2006 Toyota Tacoma

how do I tell which side is bank 1 and if it is the front or back
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PASSINGGERS SIDE IS BANK ONE. TEST CATT FOR TEMP OR REMOVE O2 SENSOR AND INSP CATT WITH BORE SCOPE. YOU CAN ALSO TEST FUEL TRIM AND O2 ACTIVITY
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