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Joined: Jan 2002
Posts: 85
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had a check engin light, code reader at autozone said "EGR valve flow excessive" So I bought a new EGR valve....reset the computer and I still get the check engin light. Anybody have any ideas what could be causing this code besides the EGR valve itself??
2000 SVT #1633/2150 many mods, many more to come http://www2.gvsu.edu/~hafnerb/11h/car.jpg
"If it doesn't fit, force it, if it breaks, it wasn't meant to fit in the first place."
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Joined: Mar 2002
Posts: 1,040
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Presumably there was some time/driving between re-setting computer and the return of CEL?
98 Mystique LS v6 atx 110,000km
97 Contour LX v6 atx 125,000km
stock CD on LS, cass on LX
spoiler, tinted windows on LS only
4 wheel discs on LX only
All other available options on both
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Joined: Apr 2001
Posts: 498
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CarpePoon wrote: had a check engin (sic) light, code reader at autozone said "EGR valve flow excessive" So I bought a new EGR valve....reset the computer and I still get the check engin (sic) light. | You need to do more than just buy a new EGR valve. Having done that, you need to remove the old EGR valve, and install the new one in its place. |  |
{I do hate spam, but that isn't really part of my email address. Remove the string ?HatesSpam? from the email address ?BobHatesSpam@blaylock.to? to email me. No advertisements. Spammers will be dealt with very harshly!} ------- Moonlight Blue 1996 Mercury Mystique GS , Zetec engine, ATX. No mods. (Well, OK, one mod. Before I got rid of my previous car, a 1994 Tempo, I swapped radios. I liked the Tempo's radio better. That counts as a mod, doesn't it? I also kept one of my Tempo's wheels to use as a spare. I hate those stupid ?compact? spares that come with modern cars. Does this count as a mod? If so, I guess I have two mods. Replaced burned/melted blower switch and connector on 19 February 2002 with a 1P3T toggle switch from Marvac and a Molex connector from Rat Shack; I guess this now makes three mods.)
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Joined: Dec 2001
Posts: 237
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Originally posted by CarpePoon:
had a check engin light, code reader at autozone said "EGR valve flow excessive" So I bought a new EGR valve....reset the computer and I still get the check engin light. Anybody have any ideas what could be causing this code besides the EGR valve itself?? My bet would be that the EVR (EGR vacuum regulator) is bad. Here is the text from the Ford Technical Service Publication (TSP)(I assume you received a P0402):
Diagnostic Trouble Code (DTC) P0402 indicates that Self-Test has detected EGR flow at idle.
NOTE:
If DTC P1405 is in Continuous Memory, diagnose that first starting with «HE50».
Possible causes:
-- EGR valve stuck open.
-- EGR vacuum regulator (EGR V.R.) solenoid vent plugged or iced.
-- EVR circuit shorted to GND.
-- EVR circuit shorted to VREF.
-- Pinched/iced pressure hoses.
-- Improper vacuum hose connection.
-- Plugged/pinched EGR V.R. vacuum hose.
-- Plugged EGR tube.
-- Damaged EGR V.R. solenoid.
-- Damaged Differential Pressure Feedback EGR (D.P.F. EGR) sensor.
-- Damaged PCM.
1996 Contour SE Sedan 4D (Royal Blue)
Duratec V6 2.5L 24-valve DOHC
Automatic
75,000 miles
No Mods (unless you call the DMD a mod)
Replaced EGR valve (gunked up), EVR (EGR VR), PCV valve, and evaporative emissions hose (cracked).
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