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P0400 Diagnostic Trouble Code Discussion for March 2010

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1996 Mercedes-Benz E300 3.0L Cuts out, Stall VIN: WDBJF20F9T
P0400: egr flow. ... techs out there. This car came to us from another garage that was unable to diagnose the car. The car shuts off at 2800 rpm and sets the code p0725. The tach fluctuates rapidly about 400 rpm back and forth as soon as you hit 2750 then right around 2800-290...
March 17, 2010
1997 Mazda 626 LX 2.5L MIL Lamp on VIN: 1YVGE22D9V
P0400: EGR System Flow Malfunction. ... shop-keeps resetting code p0400. 1st i had no vacuum to the boost sensor solenoid-pipe from intake was plugged-cleaned that. then no vacuum to boost sensor due to def. solenoid-replaced it,i now have vacuum when solenoid is grounded. but when driving car o...
March 25, 2010