SVX Network Forums Live Chat! SVX or Subaru Links Old Lockers Photo Post How-To Documents Message Archive SVX Shop Search |
IRC users: |
#1
|
|||
|
|||
Check Engine Light: A basic question
Shouldn't a check engine light stay illuminated until the offending code is cleared? What would cause the light to come on, then abruptly go out just a couple of miles down the road?
Okay, so that's actually two questions... dcb |
#2
|
|||
|
|||
Re: Check Engine Light: A basic question
Yes, if you have a foult.
A guess: the lambda. http://www.subaru-svx.net/forum/showthread.php?t=54033 Last edited by Stillhoff; 03-07-2011 at 07:31 AM. |
#3
|
|||
|
|||
Re: Check Engine Light: A basic question
I have a CEL that comes on sometimes when I start up the car then goes off a little ways downt he road. When I pulled the code it was EGR issues.
|
#4
|
||||
|
||||
Re: Check Engine Light: A basic question
Here's the simplified version:
Each sensor is tested several times a second. One bad result is usually ignored, but if you get several bad results in succession the ECU will decide there is a problem and trigger the light. If you then get a whole load of good results without any bad ones then the ECU will decide the problem has gone away and turn the light off again.
__________________
Subaru ECU and TCU Website 1992 Alcyone SVX Version L 1992 Alcyone SVX Version L 1994 Alcyone SVX S40-II 2004 Subaru Legacy 2.5 SE Sports Tourer 1996 Subaru Legacy 2.2 GX Wagon 1988 Subaru Justy J12 SL-II |
#5
|
|||
|
|||
Re: Check Engine Light: A basic question
Quote:
dcb |
#6
|
|||
|
|||
Re: Check Engine Light: A basic question
I also have had this cel situation, I believe it caused by old hard vacuum lines, always goes off though..........G.
__________________
I thimk ther4 I an, what? huh! 03 Baja. 05 Baja turbo 92legacywagon"snow" 94legacywagon"whinny" 84Brat"huey" 92svx"samantha".pearl 92svx"sabastian"4.44 silver 92svx"sabrina".ebony 05legacy gt limited "Moon" blue. 06 Subaru legacy gt limited. |
Thread Tools | |
Display Modes | |
|
|