Scanned the truck today

[jesilvas]

Went and hung out with a buddy today and his boss has a really, really nice SnapOn scan tool so we hooked it up to my truck. Ran a buzz test and all injectors sounded GREAT! I was so happy. Tried to run a contrib test but it wouldn't work
Anyway, pulled codes too. What do ya think it might be?
P1280 - ICP circuit out of range - low I did have a BD trail tune on here. Could be left over from that?

P0237 - turbocharger boost sensor A circuit low - Circuit open, short to ground, MAP sensor Dunno.

P0475 - Exhaust pressure control valve fault - Open/grounded ckt., solenoid open/shorted, failed PCM Have the EBPV unplugged from the pedestal. Would that cause both EBP codes?

P0470 - Exhaust pressure sensor circuit fault - Plugged, stuck or leaking hose

P0541 - Intake air heater A circuit low I did the AIH delete

[Austinj427]

I have no clue why, but these trucks usually don't do a contribution test without the AIH.

[late_99_PSD]

Were these all active codes? The only odd one I see is the P0237- turbo boost code. I would guess the MAP sensor, but do you have the wastegate unhooked? Lemmie do a quick google search.

[late_99_PSD]

I found this

ECSD - Manifold Absolute Pressure (MAP) Pressure - 1994-1997 Power Stroke FAQ

[jesilvas]

Yea we tried the contrib while the ac was on and it wouldn't and it also listed the AIH code. Oh well.
Active? No. I shoulda cleared em then tried it again but didn't have that much time. It was just a 'let's see what this thing will do' kinda deal.
So if the P0237 is "Signal frequency was greater than 256 Hz. for more than 0.1 seconds" and "203 Hz. 25.3PSI" then I was pushing more than 25lbs of boost? Or could it be a MAP problem?
No, wastegate is plugged in.

Would the EBPV codes be both from it being unplugged?

I'm not too worried about anything, just curious.

[late_99_PSD]

One is from the valve being unpluged and the other is most likely from the sensor and the tube on the front of the engine being pluged with soot.


As far as the map code, I think you have a problem. The truck will back down the fuel way before you get to 25, usually around 20-21.

Definatly clear the codes and see what comes back as these will be active codes. Whenever you get the chance.

[jesilvas]

I been thinking about cleaning the EBP tube . . . someday.
That's what I figured that it would defuel before then. But oh well. Yea I'll clear em and revisit. Man, if I can get more out of this truck just from a bum sensor then

If anyone else has input, feel free.

[Jake]

Originally Posted by Austinj427

I have no clue why, but these trucks usually don't do a contribution test without the AIH.

I haven't had an AIH for years and have run numerous CCT's.

[jesilvas]

Originally Posted by Jake

I haven't had an AIH for years and have run numerous CCT's.

Maybe the scanner didn't feel like it
Do you just have the wires disconnected or setup to where you don't have the code?

[Jake]

Originally Posted by jesilvas

Maybe the scanner didn't feel like it
Do you just have the wires disconnected or setup to where you don't have the code?

Both now. I did just have the wires taped up out of the way, but Bill tuned out the entire AIH stuff on his tune for me.