Lars87

Just got a code on my 96īlt4

The code reads

C12
1
---
9.
---
A.
---
1.0
what does that mean?

Redeasysport

What are you asking? C12 means it is functioning what codes do you see? --- means no stored codes.

Lars87

this is all I get, after this nothing happens.

I tried to take the battery negative terminal off, but its still there...

Redeasysport

That(C12) will always be there it indicates the aldl is functioning properly. If it wasn't there you have a problem.

Lars87

Why is my SES light still on then?

what does all the stuff after the C12 code mean?

How do i clear this and remove SES light?

Redeasysport

I told you --- means no stored codes. I suggect you do a search on DTC codes for your car. I don't have all day to explain them.

http://www.digitalcorvettes.com/foru...56&postcount=9

Lars87

But if no codes are stored, why does the SES stay on?

maybe im just stupid here..

jrp

Are you seeing the "SYS" flash below the digital speedometer, or the Service Engine Soon light on the center dash?

Retrieving codes via the dash will only get the CCM codes which trip the speedo "SYS", while you will need an OBDII code reader/scanner to get at the ECM codes indicated by the SES light. It's one of the things we lucky '96 owners have to deal with due to OBDII vs. OBDI.

Redeasysport is correct about C12. The following letters & numbers tell you which computer module is being looked at, and the dashes indicate that that particular module is not storing a code. If there was a code, it ( or they) would appear in place of the dashes.

You clear the SES light by diagnosing and fixing the problem that it's trying to tell you about, then pushing the "clear" button (or similar) on your code reader.

Redeasysport

I cannot tell you that but the FSM might. The link I gave or if you search for another will tell you how to reset the codes.

jrp

If I remember correctly, the FSM for '96 will incorrectly lead you to believe that codes for the ECM can be displayed on the digi dash. I forget which number is supposed to correspond to it - maybe "9."? However, OBDII codes are 5 characters long while the display can only show 3 anyway. I don't think the ECM can even be accessed this way to clear the codes.

It is my suspicion that a lot of the FSM was carried over from '95 without sufficient updates, and in this case it is confusing.

Lars87

Ok. So I have no chance of knowing what is wrong her, with just a papir clip?

Will these ECM codes be stored, or can I be lucky it will turn off again?

(reason i asked is that on my way out the door to the first vette meeting this year, and then this crap happens)

Redeasysport

He needs to get it scaned to pull them. Those codes start with a "P" and include O2's among other things. I forgot it was a 96.

jrp

I suspect not, but you didn't clarify which indicator is lit.

The SES light may turn off if everything is returns to operating within the correct parameters, but I'm not sure if the code is stored if that happens.

Might any of your associates at the meet have a scanner they could bring?

Red Dwarf

Lars87,

Check this site

http://forums.corvetteforum.com/show...ghlight=obd+II

jrp

Oops. By "ECM" in my posts above, I meant "PCM".

Is there a :brainfart: smilie?

Redeasysport

Thats OK we all get to smell each other's from time to time. I had one here earlier it is getting stinky.

Lars87

so just drove the car.

After the car had sit for one hour while is was working with the code, It started up and No SES... Than after 3 miles the SES came back on again. Its raining heavily here, could that be affecting some thing?

After my one hour drive, I seems like the car is only running on 7 cylinder at idle and low rpms. But its not all the time..And when i blip the throttle it comes on 8 cylinder just fine.

BTW the idle has dropped to 500 rpms, is that normal?

wayne k

try the link below it will explain your codes ,read it carefully and you will be able to figure it out.

wayne k

http://s-series.org/component/option...,60/task,item/