Edited by ukat3442 on January 12, 2017, 8:29 pm
Like Tony said if the rear sensor is same as front then it's the cats, the rear sensor should hold around 0.4 v when hot and at idle for an efficient cat.
Regards
Shane
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Kia Sportage 2.0 16v G4GC 2007 - Emission failure, code P0133 Bank 1 sensor 1 slow response - Fixed - Alan Potter January 10, 2017, 2:17 pm
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on January 12, 2017, 8:29 pm, in reply to "