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Discussion Starter · #1 ·
When reading OBD II codes, and the fault is in Bank 1 or Bank 2, which side are they referring to? Anybody know for sure? I have a Lambda control adaption fault on Bank 2, and I wonder which O2 sensor to replace.
 

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Bank 1 is the drivers side, how many miles on the truck? 2 thoughts, replace all the O2's if you have over 70,000 miles and pull each spark plug and see what caused the failure, bad plugs, wires or a failing injector.
Mike J.
 
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