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Got codes! DTC's. Dang.

2K views 28 replies 3 participants last post by  TurboSevenThree 
#1 ·
I have two backpressure codes. It was sitting at 359-365 kPa for backpressure. Any idea what backpressure is SUPPOSED to be? I believe the scanner said it should be above 28psi and it's at like 55psi. Is that right? Where it should be?

Please help.
 
#2 ·
:bump:


Btw while I had the scanner (it's a SnapOn MODIS) on I did an injector buzz test and it said no codes, I also verified that my ABS sensor is still the only one messed up (since I messed it up), and the Air Bag code was only "Pad Lamp Inoperative" code so that don't mean THAT MUCH to me.

It's the back pressure codes I'm a lil worried about. I figured it may be from my Wastegate Delete mod. :dunno:
 
#3 ·
:bump:

Oh and it said there was a KAM error code but it also said that could be from unhooking the battery(s) for a time, which I did when I put the S&B intake on.
 
#4 ·
Nobody?

:bump:
:bump:
:bump:
 
#5 ·
scraph? Tank? Maintain?

...anybody home?
 
#7 ·
yes that's right for the KAM error, and the backpressure ones i think were p0470 and 0478 or 0473 something like that... i'll have to check, i wrote them down but i can't get to them at the moment. Thanks Dirk!
 
#9 ·
No chip or anything that i know of. But I did have the batt's unhooked for about 1.5 hours or so w/ no keep alive a couple weeks ago

codes:
p0603
p0470
p0478

is what they were.

And I appreciate your help really. thanks.
 
#12 ·
interesting, I'll get right on that as soon as I've got time. Sounds like fun.
I have been noticing a drop in mileage, but I did put a good intake on it and changed the fuel filter and put a tank of non-middle-of-winter-junk-blend fuel into it, Betcha this will help too.
 
#13 ·
holy cows in india i got more

So I cleared the codes when i had the scanner on, hooked it up again today a few days later and the backpressure ones are back obviously, cause i haven't had the chance to clean anything. And the p0603 is still gone, so that must have been from when i undid the battery but now I have 7 tranny codes! All for cruise control switches... wth?! i used it this morning it works fine! but I've got these codes, all in a row, for each button:
p1536 <- Parking Brake Applied (for high idle mode) not working? it works tho.
p0565
p0566
p0567
p0568
p0569

what do you think? i'm a little lost :dunno:
 
#15 ·
Yeah it did, it was in functional tests, on a SnapOn, this time a SOLUS scanner. So it pretty much means nothing and I shouldn't worry about it? I REALLY don't wanna tear into all that wiring in/behind the steering wheel if I don't have to.
 
#20 ·
OK

So I had a day to myself so I took the time to clean out the sensor and tube. I don't think it was completely clogged but it was close. The tube was VERY restricted, the sensor was nearly clogged, and the bracket was about 60% full of soot.

Tomorrow I should be able to hook the scanner to it and see if the codes cleared. If not I will clear them and check the next day and see if they showed up again. I'll update then.

Thanks for the help! This is why I love the ORG!!!
 
#21 ·
Had to change the sensor. That was a pretty penny. I put the scanner on again today and was still reading the codes after I'd cleared them, and only read like 2psi less backpressure, I unplugged the sensor and it stuck at 43 psi (obviously, it was unplugged) and plugged it back in and it read almost the same. I called up the dealership and they said it was indeed a common problem, changed it and HOPEFULLY the codes will go away and stay away, I'll check tomorrow when I have the scanner again...
 
#22 ·
HAH, this thread has 152 views, and 20 replies, 15 of which are mine :doh:
I must like talkin to myself.
 
#24 ·
Yep. Seems fixed!
 
#25 ·
Just adding to this, i am getting the same backpressure codes. However i did the EBPV mod to make an exhaust brake., but I hardly use the function. A few days ago, my truck seemed to lack in power as if there was a restriction like when the EBPV was closed. I looked at the actuater rod and the valve seemed to be fully open. I then changed the IAT sensor because I believe that I ruined it while cleaning my air box. Nothing changed as far as the lack of power. Another thing to add is that my truck has been straight piped for quite sometime and I believe that my truck actually sounds a bit quieter than before all this happened. Any suggestions?

2002 7.3
afe stage 2 pg7
banks power pack minus the engine module
superchips High performance tune
 
#27 ·
Well I ended up having to get a new EBP sensor because it was ruined either from me or before. I cleaned out the tube, and am straight piped. Got AROUND 14psi backpressure. If you're sure your EBPV is open I dunno what to tell you, maybe your wastegate? Otherwise I'd say wire your EBPV open permanently.
 
#26 ·
i just added a sinature, just seeing if it works
 
#28 ·
Yeah, My mind is boggled. I did change the IAT sensor. Like I said I looked at the EBPV actuator rod, and it is definitley open because I can see the actuator rod hitting the stop on the housing of the EBPV. Maybe I'm just paranoid??? Thanks for the reply though, and sooner or later I'll get around to cleaning the sensor and tubes.
 
#29 ·
Get a scanner hooked up to it to read the backpressure and convert it. it comes up as kPa and is easier for me to just get the specs and convert it to psi. Basically with that sensor shot it was reading 55psi of backpressure. After I replaced it, 14psi. That way you can see if it's your brake. Maybe it only throws the codes when you use it, but still stores em.

I didn't notice anything as in it running differently, idling different, nothin.

But using something like a Snap On MODIS scanner would be your best bet, or what the dealership has.
 
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