Did a self code test, here is the video of it. I am posting this asking you guys to decipher so I can make sure i did it correctly as well.

http://www.youtube.com/watch?v=t7QKDcrRJqs

 

heres the codes I got myself but I wanted to make sure I read it correctly:

33 EGR valve opening not detected.
41 HEGO sensor circuit indicates system lean (right side).No HEGO switching detected always lean (right side).
95 Fuel pump secondary circuit failure. The EEC senses infinite resistance to ground from the fuel pump on the Fuel Pump Monitor circuit.

 

You read them correctly. Those were all three stored in memory. The fuel pump code could be triggered if you switch between tanks with the engine running. It won't hurt anything, but it could set that code. If you are having fuel pump problems, the faulty fuel pump could cause the lean code by not supplying enough fuel to the engine. The EGR code could be caused by several parts of the EGR system. A little troubleshooting is needed to determine the specific reason the EGR valve opening is not being detected.

 

I had a check engine light which is why i pulled the codes. Which one of those would throw a CEL?

 

anyone know?

 

I would guess the 41

 

thanks thats what i was thinking as well just needed another opinion. Anyone else?

 

Thanks for the video!!!!!

I've read and heard about the self test codes but the video brings it all to light. Looks like the codes loop after the last code.

I don't have a CEL on but at least I can find the codes now. My chiltons has a cross-reference on the codes.


Pretty simple. Great info.


/Ricache

 

You certainly did read the codes right.
you got the 1-1 system pass(current condition), repeated....then long space, single separating flash, indicating the next codes will be the continuous memory codes. Then the cm codes...in your case, 33, 41 and 95...and then they repeat.
In my 94, my egr code triggered the cel light.
Does it only come on when the engine is warm and about 30 seconds after you start driving it?(or you drive and it comes on once engine comes up to temp)

As for the other codes, I'm not familiar with. I believe there are also a few things that can trigger the 41 code.
You can use the search engine here or do some "Google"ing. I'm sure there is lots of info out there on these codes.
In regards to the egr code...make sure all vacuum lines are solid with no leaks and also, sometimes the "juicecan" on the right fender rusts out along the brackets which is used to secure it to the fender and therefore losing vacuum there. That has been know to the an egr code.
I'm sure more often than not...vacuum is the culprit. Lots of info on how to test the various egr components as well. A electrical multi-tester and a vacuum gauge will go along way to solving that code.
The fuel pump code sounds like it may be a bad ground...but I'm really not sure.
Keep us in the loop on how things progress and what you find.

 

I might make a full how to video on the self test procedure, how to setup the wiring etc.

 

thanks for the info. Yes the CEL only comes on after it gets up to temp and im driving it.

 

My front fuel tank (I have dual tanks) doesn't work maybe thats why it throws the 95 code. When I have it switched to the non working tank and go to start the truck you dont hear the pump come on to prime the system prior to cranking so its either the pump is out or something in the wiring to the pump is bad.

 

Sounds like you may have solved that one....
I would check the wiring from the pump. Besides solving the code issue, you may also fix your non working tank...
A 2fer

 

ya gotta love those 2fer's