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P0400 Diagnostic Trouble Code Discussion for April 2009

Exhaust Gas Recirculation System Flow Malfunction

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Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1997 Suzuki Sidekick JX 1.6L MIL Lamp on VIN: JS3TDO3V9V
P0400: EGR System Fault Too Much Or Too EGR Little Flow). ... fail DEQ due to p0400 check light.Pull the egr valve, transducer, and the pipe to intake and clear all the carbon buildup. It was 80% plugged. reinstall all the parts. I also check the egr vacuum valve; the egr check solenoid; and the map sensor according ...
April 03, 2009
2002 Mazda 626 LX 2.5L MIL Lamp on, p0400 VIN: 1YVGF22012
P0400: EGR System Flow Malfunction. ... have this 02 mazda 626 with 2.5l setting p0400 egr flow low code. replaced egr valve after following code chart, code came back and now has rough idle. rechecked boost sensor, solenoid and egr valve wiring, data, and ohm values. removed egr valve and check...
April 20, 2009