OBD II Question
Thread Starter
Drifting
Joined: Jun 2001
Posts: 1,490
Likes: 17
From: Darlington, MD
OBD II Question
If a code is set and check engine light comes on and the problem is corrected, how long does it take for the code to clear and the check engine light to go out? Thanks in advance, Guy
Burning Brakes
Joined: Aug 2001
Posts: 1,238
Likes: 0
From: walled lake MI
just FYI, you have OBD-I, not II.
if you set a code, the light will also go out if the ECM finds the faulted input operating normally again for a given time period. however, when the light goes out in this way the code will still be stored on the ECM until you pull battery power as TM-96CE mentions.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by TM-96CE
remove the negative cable on the battery for about 10 min and it will clear.
Just curious, but will pulling the fuse for the ECM accomplish this too?
Racer
Joined: Oct 2003
Posts: 273
Likes: 0
From: Midland Texas
If you fixed the problem, the light will go out immediately. The code will still be stored in the ECM. You can pull the fuse to the ECM and it will clear, but you will not know it, because the light will already be out, unless you have a scanner. 
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