i just failed my smog test, and decided to buy a scanner to see what codes are making my check engine light come on and i was really surprises

here are the obd1 codes

32
31
41
64
83
82
81
79
78
77
76
76
92
91
89
88
87
86
85
18
17
29
28
22
32
99
98
then it repeats 89, 88, 87, 86, 85 for some reason which i have no idea why.

is it possible that all these things are wrong and how much wold it cost to replace all of this???


this is the link i used to get the codes but not all show up..
http://www.gmtuners.com/OBD1_DTC.htm

what should i do?? wortth fixing??

 

The ones that stand out to me are the bottom two -

DTC - 98 Invalid PCM program

DTC - 99 Invalid PCM program

Sounds to me like someone tried to reprogram but didn't know how. You may just need to swap the chip.

 

oh alright how much does a new chip cost and how would i install it??

 

First off, you don't have a chip you can replace. Programming is done by flashing the chip memory.

Second, reset your PCM by removing the PCM BAT fuse for about 30 seconds and then take another scan and see what is there. You can find a list of f-body specific trouble code by the link in my sig.

 

You have a '94 tht has flash memory not a replacable chip. You will have to re-program the pcm with a good copy of your tune. From the list above, someone may have swapped in a pcm from an automatic car (or they may have swapped in the manual). Most likely what happened was that someone tried to re-program the car, killed the computer (not as hard as you might think), then replaced it with one from an automatic (or at least an automatic tune)

I always clear the codes and drive it a little while. For some reason, the phantom codes will apprear when you have other codes. Then look at http://shbox.com/1/Dtcs.htm for the description of the codes.

 

Shoebox beat me to it...

 

alright i removed the fuse and it got rid of 5 codes whihc were related to the egr but a lot of them are stil shoing up like 98 and 99

and also my check engine light doesnt turn on when i turn the key on and thats another reason to not passing smog

any tricks to turning that back on??

 

Sorry you have to smog test!!!!

 

how do i turn my check engine light back on?? 94 trans am so its obd 1

i have a realy nice scanner but its really useless to me sense i cant erase codes or anything

 

Pull the PCM fuse for around 5-10 minutes....it will clear the codes.

 

What kind of scanner do you have? INNOVA is a great scanner...
INNOVA

 

Why do you want to turn the SES light back on?

Even if you "clear" a code with a scanner, its going to come right back if the problem is still active, once the engine or trans operates under the conditions where the PCM runs the diagnostics.

To clear, pull the "PCM BAT" fuse for 30 seconds.

What scanner? A lot of those aren't even valid codes for a 94 LT1.

 

I think he means the light is out, as in not working. It's not lighting up during the 'light test' when you turn the key on. Someone may have pulled the bulb, or it could be out.

 

What codes do you need? Maybe I can help, I got this book here that has most of them.

 

Just a tip, just because the code may be present does not mean that sensor is defective. The sensor may be triggered but something more in depth in the engine. So dont just replace sensors hoping to fix the problem, you will spend a pile of money. Sounds to me like there is something going on in your pcm like carguy was saying.