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no, that has to do with the main mother board computer that runs all the electronics in the car, like all the sensors. i have heard that 04 trailblazers the PCM had a fault code that would mean nothing, i have only had one person tell me this, but i have the same problem and it dont seem to make it run different but it comes back every time i clear it.

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Q: Does the diagnostic code P0606 on a 2004 Chevy trailblazer also refer to the secondary airevaporation systemand catalytic converter?
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