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Ford F150 - Trans. code 624

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lcole1969
Regular Member

Joined:
04 Jun 2007
Posts: 49
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From: Noblesville, Indiana
Truck: 94 F150
XLT 4X4

Posted: Sat Jul
14, 2007 12:16 pm
Post subject: Trans. code 624

Quote

I have a 94 f150,
5.0, E4OD, 4x4 with a trans.problem.

When checking
codes I got a code 624
"electronic pressure control circuit failure", what is this
and is there a cheap cure like maybe seafoam trans treatment
and a flush?
I also had a code during KOER test, code 632
"Trans. control switch circuit did not change states during
KOER" after clearing codes and driving awhile I tested it
again and only recieved code 624.
It seems to shift late and
if I kick it down it seems to slip or go into a protection
mode(to much pressure) but it comes out of it, it also shifts
through all the gears just fine other than maybe late. fluid
is full and doesn't smell or look burnt, yes the OD light is
flashing.
I was told that it is a stuck valve, that is why
I thought maybe a treatment and flush. Any ideas what it could
be ,how to check,or fix?

Thanks

bobwhitecar
Senior Member

Joined:
23 Feb 2006
Posts: 649
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From: ohio
Truck: 2007 lincoln mark lt
1971 mustang mach 1 429 cj restored

Posted: Sun Jul
15, 2007 3:45 am    Post
subject:

Quote

that sounds like a
wiring problem that hooks to the trans on the pass
side

projectsho89
Senior Member

Joined:
19 Jun 2006
Posts: 982
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From: St Louis Area
Truck: 97 5.4L
E4OD

Posted: Sun Jul
15, 2007 4:33 am    Post
subject:

Quote

624 is an ELECTRICAL fault, not a
mechanical or hydraulic problem.

You probably have a
wiring problem (bad connection, corrosion, faulty solenoid, or
PCM).

The 632 was probably due to your missing the
switch cycle testing window, it's pretty narrow.

Even
after you correct the indicated EPC symptom, I'd bet there
will still be other issues that will require repair or
rebuild.

Steve

lcole1969
Regular Member

Joined:
04 Jun 2007
Posts: 49
My
Photos
Truck
Mods
From: Noblesville, Indiana
Truck: 94 F150
XLT 4X4

Posted: Sun Jul
15, 2007 7:21 am    Post
subject:

Quote

projectsho89
wrote:

624 is an
ELECTRICAL fault, not a mechanical or hydraulic problem.

You probably have a wiring problem (bad
connection, corrosion, faulty solenoid, or PCM).

The 632 was probably due to your missing the
switch cycle testing window, it's pretty narrow.

Even after you correct the indicated EPC
symptom, I'd bet there will still be other issues that
will require repair or rebuild.

Steve

Thanks for the reply.

So how do
I check for these problems,also is the pcm the same as an
EEC-IV (just changed it out)or does the e4od have a PCM of its
own.

I have a post in v8 forum "engine stumbles/lacks
power" could my trans trouble cause my engine troubles too?

I was going to put in a salvage yard trans. but wanted
to makes sure this one was beyond me fixing it with a quick
fix seeing how it still shifts through all gears, fluid
doesn't smell or look burnt. the only time you even know
theres a problem with it (besides the light flashing)is
getting on the gas hard it shifts later then normal, also
kicking it down it seems to slip,grab,slip, or
surge

Steve83
Hardcore Ford Truck Fanatic

Joined: 02 Nov 2002
Posts: 4246
My
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From: Memphis, TN
Truck: 83 Bronco w/major mods

Posted: Sun Jul
15, 2007 10:07 am
Post subject:

Quote

The EEC controls the
engine AND trans. Why did you change it, and do you still have
the original?

Later shifting during hard acceleration
is normal - that doesn't indicate any problem.

The
slipping indicates old/wrong fluid. What's in it, and how many
miles since it was changed? Have you read the latest TSB on trans fluid recommendations?

This thread describes how to properly
perform KOER tests, & when to cycle the TCS.

Haynes describes how to test most actuators, but I'm
not sure about the EPC solenoid. You should probably get a
Ford service disk since it's MUCH more detailed. If you can't
find one, e-mail me. I have them all. It would help you track
down your other problems, too, since it contains a full PCED
& EVTM for every vehicle.
_________________
. . . '99 CV RIP

lcole1969
Regular Member

Joined:
04 Jun 2007
Posts: 49
My
Photos
Truck
Mods
From: Noblesville, Indiana
Truck: 94 F150
XLT 4X4

Posted: Sun Jul
15, 2007 11:06 am
Post subject:

Quote

Yes I have the old
one and have it back in the truck due to it not being the
problem with my engine troubles (SEE post in V8 "engine
stumbles and lacks power"). I bought this truck a few months
ago and don't know to much on the mait. exept the previous
owner said he took it to a trans. shop and they tryed to sell
him a new trans./rebuild.

I have the service disk
(ford CD) already but don't really understand some off
it.

Steve83
Hardcore Ford Truck Fanatic

Joined: 02 Nov 2002
Posts: 4246
My
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From: Memphis, TN
Truck: 83 Bronco w/major mods

Posted: Mon Jul
16, 2007 5:58 pm    Post
subject:

Quote

Click the PCED button
on the opening screen, click OK to the OBD-II manual, choose
your truck ('94 F-Series) from the menu, then go to the BOTTOM
of section 02A & dig up the code you're getting. Follow
the step-by-step diagnostic process.

Some steps
describe using a Ford-specific diagnostic tool, but if you
read thru it & check it against the EVTM (wiring
diagrams), you can usually figure out WHAT they're actually
telling you to do & diagnose around it with a regular
multimeter or test light.

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