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Message: <blockquote data-quote="Gacerra1" data-source="post: 23343" data-attributes="member: 8652">Local mechanic installed a dealer oe crankshaft positioning sensor today and changed fuel pressure regulator sensor. Car started normal and was test driven, tachometer was lost and chk engine light back after 5 minutes of driving and traction control light and stabilitrak errors. Codes were ran again p0335 and p0336 no fuel regulator. Tomorrow the mechanic is going to send for another crankshaft positioning sensor to eliminate the new one being faulty as well. I asked about a multimeter being used for all correlating wires they said yes. But who knows im at a loss for words. I have another connection at a different chevy, it seems the car will be going there next if this mechanic cant figure it out. Just unfortunate i will be going into the pockets so quick on a newer car- Thanks for the replies guys. Really appreciate it!</blockquote>