CEL Light on
Thread Starter
Pro
Joined: Nov 2007
Posts: 675
Likes: 0
From: Boca Raton Florida
CEL Light on
Took my Z out today and the Check Engine Light came on. I have an EFI Live that has never been hooked up to this car, Can anyone please give me some help with what to do to find out what caused the CEL light to come on? Also how I would clear the code using EFI Live?
Moderator emeritus
Joined: Jun 2001
Posts: 18,599
Likes: 3,954
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
You run the EFILive Scan software. It will read the code(s) and if you want you can remove all of the codes.
Click info / Diagnostic Trouble codes Or you can "Shift + F8"
Elmer
Click info / Diagnostic Trouble codes Or you can "Shift + F8"
Elmer
Last edited by eboggs_jkvl; Dec 6, 2010 at 09:44 AM.
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
You can disconnect the battery for 5 minutes to clear the CEL. If there is an ongoing problem, the CEL will come back on and you can check for codes.
Moderator emeritus
Joined: Jun 2001
Posts: 18,599
Likes: 3,954
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
Elmer
Thread Starter
Pro
Joined: Nov 2007
Posts: 675
Likes: 0
From: Boca Raton Florida
First thing I checked was the cap, although I did not get gas, it was tight. I changed or replaced nothing. I have used the EFI Live on my 09 Vert and have entered and replaced tunes with it, I have never tried the scan portion of the program. What do I do, just hook it up with the car in ACC mode no engine running and click on scan? Like I say I have very limited experience with EFI Live and only used it to download tunes in a previous car.
Moderator emeritus
Joined: Jun 2001
Posts: 18,599
Likes: 3,954
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
First thing I checked was the cap, although I did not get gas, it was tight. I changed or replaced nothing. I have used the EFI Live on my 09 Vert and have entered and replaced tunes with it, I have never tried the scan portion of the program. What do I do, just hook it up with the car in ACC mode no engine running and click on scan? Like I say I have very limited experience with EFI Live and only used it to download tunes in a previous car.
Naw, the scan is for reading the actual results of the tune while the car is running. Things like LTFTs, spark advance, Knock retard, RPMs, MAF flow, and the like.
Hook it up, run "Verify PIDs", and see what you're engine is doing.
Here is a screen-shot of what I usually monitor on my "Dashboard".
Elmer
Moderator emeritus
Joined: Jun 2001
Posts: 18,599
Likes: 3,954
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Team Owner
Joined: Sep 1999
Posts: 41,732
Likes: 1,718
From: Springfield MO
If my CEL comes back on, the code will be present at that time, to be seen by the dealer's tech. Does it matter what happned a year ago to cause the CEL to come on if nothing's wrong today? If something happens tomorrow to cause the CEL to lite, then the Tech will be able to read the current code tomorrow and perform the corrective procedure.
Thread Starter
Pro
Joined: Nov 2007
Posts: 675
Likes: 0
From: Boca Raton Florida
I have been trying to load the program into my new laptop, I keep getting an error code 740 or 704, 740 I think, EFI help tell me that I need to be registered as administrator, well I am ane I still can't load it. I guess I will fire up my old laptop and try to use that one. It I have used that one in the past. I still am not sure how to read codes once hooked up to the car, all I have ever done is load different tunes into my past C6, can someone give me a short detail of what to do once I plug into the car in order to read and clear the CEL please?
Moderator emeritus
Joined: Jun 2001
Posts: 18,599
Likes: 3,954
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
I have been trying to load the program into my new laptop, I keep getting an error code 740 or 704, 740 I think, EFI help tell me that I need to be registered as administrator, well I am ane I still can't load it. I guess I will fire up my old laptop and try to use that one. It I have used that one in the past. I still am not sure how to read codes once hooked up to the car, all I have ever done is load different tunes into my past C6, can someone give me a short detail of what to do once I plug into the car in order to read and clear the CEL please?
Get the software loaded on your PC AND get the latest software for your interface and then we'll do the connection stuff.
When you're current, I do:
Plug in to DTC, plug into V2 handheld, connect V2 handheld to laptop, open scanning software, click on "connect", tell it what type of ECM I have", click on record, and I'm scanning. The first time you hook up, you will need to "Verify your PIDs". The PIDs you want to monitor need to be selected (don't select all or you won't get squat) I have 19 selected for 24 channels (some PIDs need 2 channels). You will probably need to adjust your dashboard initially to display the PIDs you've selected (not too hard, a right click, a menu selection and it's done). I've already displayed the screen I use and I can help you with your setup but you need to get it loaded onto the laptop that YOU want.
Elmer
Moderator emeritus
Joined: Jun 2001
Posts: 18,599
Likes: 3,954
From: Jacksonville Florida BWO Dayton, Cincinnati, Bloomsbury NJ, Cincinnati
2015 C7 of the Year Finalist
