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Originally Posted by jtc001
I have a 2001 Silverado with a 5.3 l v-8. The check engine light came on and it pulled a code P0135B -Heated O2 Sensor Bank 1, Sensor 1. What does this mean and what are the most likely causes? Where is bank 1 and where is sensor 1? The truck has 100K on it. Thanks.
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Bank 1 is the left side or driver side of the engine (clyinders 1,3,5,7)
Bank 2 is right side or passenger side of engine (clyinders 2,4,6,8)
Sensor 1 bank 1 is the oxygen sensor located left side of engine on the exhaust pipe before the catalatic convertor.
Check the wires for breakage, if wires are good I suggest replacing sensor since life expectancey of sensor is 100,000 miles.