jacob davis
SDD Junior Member
my truck keeps throwing the 402 code its been in the dealership twice still didnt fix the problem, I have a intake and exhaust no chip? any help
egr code
- Thread starter jacob davis
- Start date
my autoenginuity software reports "P402" as
EGR-FLOW EXCESSIVE DETECTED
im just guessing but i BET if you take that intake off
and put the STOCK intake back on the code will
go away.
i know for a FACT that the exhaust <alone> will NOT set the above
code...
I see your from california, am i right ?
Is your CEL or MIL (check engine light or malfunction indicator light)
on ?
on california trucks emissions codes (like egr) should turn the
light on.
personally id wanna CHECK/TEST the egr valve (autoenginuity does
that)...to determine if the valve is sticking (open or closed) before
i considered replacing the valve or putting the stock air box back on the
truck.
on the other hand (im thinking/working thru this as i type) you
would be getting different codes if the valve were opening and
closing erractically or sticking.
so i suspect its your highflow/aftermarket airfilter (you dont say
what brand/size exhaust or the brand/setup on the intake either)
i HIGHLY recommend you fill out your profile, year, model etc of
your truck...it would be helpful.
EGR-FLOW EXCESSIVE DETECTED
im just guessing but i BET if you take that intake off
and put the STOCK intake back on the code will
go away.
i know for a FACT that the exhaust <alone> will NOT set the above
code...
I see your from california, am i right ?
Is your CEL or MIL (check engine light or malfunction indicator light)
on ?
on california trucks emissions codes (like egr) should turn the
light on.
personally id wanna CHECK/TEST the egr valve (autoenginuity does
that)...to determine if the valve is sticking (open or closed) before
i considered replacing the valve or putting the stock air box back on the
truck.
on the other hand (im thinking/working thru this as i type) you
would be getting different codes if the valve were opening and
closing erractically or sticking.
so i suspect its your highflow/aftermarket airfilter (you dont say
what brand/size exhaust or the brand/setup on the intake either)
i HIGHLY recommend you fill out your profile, year, model etc of
your truck...it would be helpful.
jacob davis
SDD Junior Member
I have the afe stage 2 intake and 4inch exhasut. the delership replaced the valve and the solinoid. you are probobly right about my truck being a california vehicle. will it mess anyting up if I run it like that? thanks
ive seen no real proof that the factory original filter is
performance limiting...and imo there too much risk of damaging
the turbine vanes themselves by running a "free-er breathing"
filter (you dont get less restriction w/out letting more thru the
filter...including DIRT).
if your CEL/MIL light is on you wont pass inspection (in any state),
if youre getting codes / malfuntion indications its fact that other
mechanisms on the truck will try to compensate for the problem, which
likely will affect the performance and drivablity of the truck and impact
the fuel mileage as well as potentially weari out / over-work
other "things" (vgt & ebpv come to immediate mind).
even more alarming is the history behind ford (and their dealers)
of VOIDING warrenties because of add on items that "trip" codes
or cause errors that would not normally be caused by OEM equipment.
what solenoid did the dealer replace ?
performance limiting...and imo there too much risk of damaging
the turbine vanes themselves by running a "free-er breathing"
filter (you dont get less restriction w/out letting more thru the
filter...including DIRT).
if your CEL/MIL light is on you wont pass inspection (in any state),
if youre getting codes / malfuntion indications its fact that other
mechanisms on the truck will try to compensate for the problem, which
likely will affect the performance and drivablity of the truck and impact
the fuel mileage as well as potentially weari out / over-work
other "things" (vgt & ebpv come to immediate mind).
even more alarming is the history behind ford (and their dealers)
of VOIDING warrenties because of add on items that "trip" codes
or cause errors that would not normally be caused by OEM equipment.
what solenoid did the dealer replace ?
Last edited:
jacob davis
SDD Junior Member
on my truck it looks like a solinoid on top of the valve, that is also what the service writer said but we all know that they dont know much
im assuming by valve you mean EGR valve...its a self contained
valve w/ an actuator (solenoid) built ontop of it...you cant change
one w/out changing the other...theyre built together and considered
to be a SINGLE part.
is your CEL/MIL light still on ?
are you still throwing codes ?
hows the truck running ? idleing ?
valve w/ an actuator (solenoid) built ontop of it...you cant change
one w/out changing the other...theyre built together and considered
to be a SINGLE part.
is your CEL/MIL light still on ?
are you still throwing codes ?
hows the truck running ? idleing ?
jacob davis
SDD Junior Member
the code is still on, it idles ok but this weekend I was towing my boat and I idled around a turn after about a two hour drive the turbo sounded like it was cutting in and out?
