How come I only get codes if......
Thread Starter
Le Mans Master
Joined: Jun 2003
Posts: 9,251
Likes: 217
From: 2007 Nat'l Corvette Challenge 11.50 index Champ. New Jersey
How come I only get codes if......
I go manually into the codes by holding the options button & pressing the fuel button 4x)?
They always have an H after them (history) too.
Shouldn't I get a code message in the DIC upon start up if there is a problem? I can't check everyday for codes!!
Ron
They always have an H after them (history) too.
Shouldn't I get a code message in the DIC upon start up if there is a problem? I can't check everyday for codes!!
Ron
Melting Slicks
Joined: Apr 2002
Posts: 2,631
Likes: 2
From: Clever, MO aka SOMO
No, the dtc (diagnostic trouble codes) can only be retreived by doing the manual procedure that you described or by plugging in a scanner tool. I never check mine unless I've had some type of problem with warnings flashing on the dic, etc. Having H codes is okay. If you had a current trouble code or problem, it would show C and you would want to check that out.
Good luck,
Fix
Good luck,
Fix
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
If you have a current code the car will let you know so you don't need to check them all the time. Once you get an alert you can then pull the codes and see which one is current. After that you need a service manual to figure out how to diagnose the failure. The code only gets you started it is not necessarily a failure callout.
Bill
Bill
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Some DTC will NOT set the CHECK ENGINE light! Usually history codes are only set for a very short time, and then the problem that set the code clears. Low battery will cause a lot of the error codes. As soon as the car starts the alternator takes over and NO CODE!
BC
BC
Team Owner
Joined: May 2004
Posts: 26,345
Likes: 232
From: SoCal
Originally Posted by Dr.Ron
I go manually into the codes by holding the options button & pressing the fuel button 4x)?
They always have an H after them (history) too.
Shouldn't I get a code message in the DIC upon start up if there is a problem? I can't check everyday for codes!!
Ron
They always have an H after them (history) too.
Shouldn't I get a code message in the DIC upon start up if there is a problem? I can't check everyday for codes!!
Ron
You can do it while you are driving.
If you hit the reset button after codes start displaying it will stop the automatic scrolling thru the codes. Then hit the options button repeatidly and you can skip thru the codes quickly. You can exit the codes quickly and return to normal guage readings by hitting the e/m button
