GM Repair Problems? Ask GM Repair Expert Now.
Hi there, I am Cam. Can you tell me if you have any codes set?
OK, sO to have codes on bank 1 or the drivers side of the engine suggests that you might have an exhaust issue, a ground issue for the coils on that side of the engine. What I would do is test for plugged catalytic converter on that side. Do you plan on doing the repairs yourself or are you looking for ideas of what the issue is to get it taken care of?
I don't think for a second it’s a bad sensor, rather I think the converter is starting to restrict flow and would cause this. Do you notice any lack of power?
The light was flashing, that almost confirms it. We test only when we have an issue. I am now thinking very much about that converter. You may find many exhaust shops will check for free. I would avoid aftermarket converters as a replacement as they don't seem o perform the same as GM or AC Delco and will often set more codes.
The engine is a big air pump. Anything that prevents proper air flow in or out will change how it fires. A plugged cat causes back pressure preventing proper air flow through the engine.
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