95 pontiac sunfire 2.2

having a problem with a quad driver fault!!!!!!! computer keeps tripping qdm-b code onlyafter car is driven for awhile

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vettes4life
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You will need to look at the ecu/engine electrical schematic to find out what the quad driver drives. Odds are it's related to egr or purge valve, but it could also be trans sensors or solenoids.

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