Ok, so I read on this forum how to check the codes and I went through them all and tried to reset them as instructed. The ones that would not reset, I will list so maybe I can see what is going on with the different problems with the car. The window wiper motor is out of the car right now so that maybe some of codes. I cleaned out the udders and took the cover off of the circuit board and there was definitely some corrosion in there, so I think the crazy wiper problems have been found. On to the rest of the issues, The A/C doesn't work and I already have the ZO6 shocks in my possession to fix the F45 problem that is limiting my speed to 80mph. The only other issue that I know of is the oil pressure gauge not working and have already ordered the Buick pressure sensor and adapter to fix that.

The CODES : C 1255 HC
C 1255 C
C 1786 HC
C 1787 HC

B 2527 HC

B 0361 H
B 0363 HC
B 0367 HC
B 0441 HC
B 0446 HC

C 2120 HC
C 2121 C

Thanks for all the help you guys have already gave over the last few days and for all the posts I have already poured through on the site. I love the college of internet

Chad.

 

You may want to put the year, auto or manual, mods if any... etc the more info the better

http://www.stengel.net/diccodes.htm

 

Hi Chad. I see you're new here on CF as you've only had 11 posts so far. Very good. Couple of things you might consider. First, please finish your profile. There is not much info about you, where you live, what year Vette you have, etc. There are some differences in the various years of C5s that have to be taken into account. Second, a little history of the car if possible. Miles, condition, modifications to the car, etc. These are small things but they can help the CF members when they're assisting you. There are some guys on here that are genuine gurus on the C5 (I'm not one of them but I do have quite a lot of experience) so give them as much ammunition as possible. Ok, here goes:

The C5 can be very sensitive to voltage so keep the battery charged up. If not, you can get some codes thrown. Also, while reading your post, you mention several items and you're going to have to sort them out, one at a time. You mentioned "some corrosion" and that makes me ask if your car been in a moist environment? I'm going to hit some highlights of your post and make some possible suggestions.

First, here's a list of the GM codes.
https://www.corvetteforum.com/forums...s-from-gm.html
Looking through your list, first thing I'd do is check all your grounding locations and make sure there is no "corrosion" on them. Make sure your battery is fully charged.
Your first code C1255 is an EBCM failure and the C1786 is RTD Control Relay Malfunction. The C1787 is related with a Control Relay Open or Short To Ground error.
B2527 Horn Relay Circuit
The B0361,0363,0367,0441,0446 are all related to the Left and Right actuators. Those are located under the dash, above the radio, and there are several possible causes and fixes. This could be the reason your AC doesn't work.
The last two, C2120 and C2121 are related to your tire pressure monitoring system. Again, several possibilities of the cause and possible fixes. We'll get into each one but now its your turn. Tell us about the condition of your car. Miles, problems, mods, etc. How long have you had it? Just be honest about everything and we'll get this all sorted out. I'll monitor things with you as will others.

 

Ok, the car is a 1998 targa 6 speed manual trans. It is a car that has been on the coast of Florida all of its life. I live in Orlando Fl. where the car will reside. The car is in great shape cosmetically, but it definitely needs some issues worked out mechanically. There is corrosion throughout the engine bay that is evident by just a visual inspection. The car as far as I know is bone stock everything. I have had the car for only about 10 days now. It is my first Corvette but I have owned a worked on about everything else under the sun. When I tried to delete some of the A\C codes last night I did hear some tired sounding actuators inside the dash trying to work themselves out. The previous owner said he put some of the freon in a can into the system(no-no) and it blew nice and cold. After a few weeks it stopped working again, but you never know about the truth of previous owners. He did however seem like an honest guy. The battery shows 13.2 when running on the meter inside the car and 11.98 across the battery terminals when off. The sticker on the battery shows it is from 07/2012. Might be time for a new battery, I have read on the site that these cars need good voltage before start and that is a little low. When I bought the car the 80mph limit was on the car due to the shock failure and I have the new ZO6's to put on. I am going to either put the resistors in line or just punch out the sensor like some have said and that should resolve that problem. I also have a oil pressure of 0 on the gauge but have ordered the Buick sensor and adapter to fix this issue. Other than the A/C not working I think thats all I know of. I will look up how to fix the ground issues and start that today.

 

NICE... congrats on the NEW to you!

 

11.98 is not low, the battery is considered to be DEAD with regard to C5s.

C1255 is considered to be the Code of Death for an EBCM. In rare cases it has been resolved by fixing a power or ground issue but it indicates an internal malfunction which if true cannot be fixed. Unfortunately for you the 97-2000 EBCMs are hard to find and they are used and expensive. Of course you will still have normal braking, just not ABS or TC.


Mr. Sam

 

I thought I'd seen that expression used before, not true for the 01-04? They can be fixed? Correcto?

 

so you want info on codes and the help you get is to finish your profile info.... fantastic win for CF

 

Feel free to jump in on the code helping thing...

 

typed up a private message for ABSFIXER and nothing. It says it has no members as such. Is there possibly a letter missing?. Looked on Ebay and WOW you were not kidding. 1100.00 for a used part... Ouch!! Is this a common problem? You would think someone out there would be making these and pullin in some serious dough. On my 911sc the CIS systems have know cold start issues due to warm up valve that no longer exists but there have been people making electronic units that are even better. Maybe in a few more years when these are considered antiques someone will make an aftermarket unit.

 

Thats funny just spent the last few mins reading that same post...LOL. I guess Im not going to get that worried about the whole thing. I am just going to fix the suspension and drive it like I stole it! Is there a way to fool the computer into thinking it is OK so it stops throwing the codes, like with the suspension? Just wondering.

 

A true internal fault C1255 cannot be fixed on any year. At least at this time.

 

We need that info to look up the correct schematics and to tell him about options for things like C1255. There are variations between the years that make a difference in codes and diagnostics.

In the future, if you actually have something helpful to add please feel free to post.


Mr. Sam

 

The easiest thing to do after checking grounds, battery voltage, and ignition is to live with it the way it is. It's better than spending $1100 plus for a used part with little or no warranty. I have been driving these since 1967 with no computer assistance. Just be sure you know how to drive a high horsepower car without computer assistance.🏎

 

Alao call abs fixer with your codes to see if the ebmc is repairable or not.