Join Now
International Automotive Technicians Network

P0400 Diagnostic Trouble Code Discussion for October 2009

Exhaust Gas Recirculation System Flow Malfunction


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0400
Help Request Posted
1997 Mercury Villager (Van) GS 3.0L egr monitor VIN: 4M2DV1110V
P0400: egr flow. cleaned egr passages replased vacume hose to egr valve reset check eng light van has 1/2 tank of gas all monitors have ran with exception to the egr monitor we have driven the van for hours every thing seems good car now dies when vac is applied to egr at idle...
October 12, 2009
1996 Mazda 626 LX 2.5L MIL Lamp on VIN: 1YVGE22D2T
P0400: EGR System Flow Malfunction. ... exhausting at this point. Vehicle originally came in with codes P1195 and P0400. There are no symptoms of any kind, vehicle appears to be running well. However, check engine light will prevent vehicle from passing state inspecti...
October 13, 2009
1997 Mercury Villager (Van) GS 3.0L egr monitor VIN: 4M2DV1110V
P0400: egr flow. cleaned egr passages replased vacume hose to egr valve reset check eng light van has 1/2 tank of gas all monitors have ran with exception to the egr monitor we have driven the van for hours every thing seems good car now dies when vac is applied to egr at idle...
October 13, 2009
1999 Volkswagen EuroVan GLS 2.8L Poor Idle Quality VIN: WV2NH2709X
P0400: egr sys problem. replaced egr per customer request, code still resets. Has good flow at pipe to egr, vac sol working, engine will exhibit poor idle with egr manually open, egr temp reading does drop very slowly to about 1.5 to 1.9 V. Any help appreciated.
October 16, 2009
1997 Mercury Villager (Van) GS 3.0L egr monitor VIN: 4M2DV1110V
P0400: egr flow. cleaned egr passages replased vacume hose to egr valve reset check eng light van has 1/2 tank of gas all monitors have ran with exception to the egr monitor we have driven the van for hours every thing seems good car now dies when vac is applied to egr at idle...
October 12, 2009
1996 Mazda 626 LX 2.5L MIL Lamp on VIN: 1YVGE22D2T
P0400: EGR System Flow Malfunction. ... exhausting at this point. Vehicle originally came in with codes P1195 and P0400. There are no symptoms of any kind, vehicle appears to be running well. However, check engine light will prevent vehicle from passing state inspecti...
October 13, 2009
1997 Mercury Villager (Van) GS 3.0L egr monitor VIN: 4M2DV1110V
P0400: egr flow. cleaned egr passages replased vacume hose to egr valve reset check eng light van has 1/2 tank of gas all monitors have ran with exception to the egr monitor we have driven the van for hours every thing seems good car now dies when vac is applied to egr at idle...
October 13, 2009
1999 Volkswagen EuroVan GLS 2.8L Poor Idle Quality VIN: WV2NH2709X
P0400: egr sys problem. replaced egr per customer request, code still resets. Has good flow at pipe to egr, vac sol working, engine will exhibit poor idle with egr manually open, egr temp reading does drop very slowly to about 1.5 to 1.9 V. Any help appreciated.
October 16, 2009