Quote:
Originally Posted by tempfixit
P0138ChevroletHO2S-12 (Bank 1 Sensor 2) Circuit High Input
Bank 1 is always the side that #1 clyinder is on, this case it is the drivers side. Sensor 2 iis after the catalytic convertor (downstream)
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so it should be on the exhaust pipe between the manifold and the cat?