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READ SOMETHING THAT SAID IT MAY BE CAUSED BY POWERTRAIN CONTROL MODULE HOW WOULD YOU CHECK THIS AND REPLACE SUCH ITEM
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What are the Diagnostic Trouble Codes? Computer failures are not that common, it does happen, but not a primary cause.
401
A P0401 is an Insufficient EGR flow code. have you checked the EGR ports for carbon build up? You probably are not getting vaccum to the EGR valve.