jon38iowa Posted August 31, 2007 Share Posted August 31, 2007 Today I replaced the knock sensor, easy enough. But, I forgot to reconect the Air Sensor ( disconnected for convenience). The cel came on, and even after reconnecting it, it remains on. I performed a search here, but was unable to find specifics on how to turn off or reset the CEL. I assume disconnect the battery. Anything more, please speak up. Thanks! Quote Link to comment Share on other sites More sharing options...
nipper Posted August 31, 2007 Share Posted August 31, 2007 Disconnect the battery for ten minutes (I forget that exact time but that should do it) nipper Quote Link to comment Share on other sites More sharing options...
Turbone Posted August 31, 2007 Share Posted August 31, 2007 10min may be to short, I suggest a couple of hours. But I think a 1/2hr is adequate. Quote Link to comment Share on other sites More sharing options...
jon38iowa Posted August 31, 2007 Author Share Posted August 31, 2007 10min may be to short, I suggest a couple of hours. But I think a 1/2hr is adequate. Ok, thanks, I will. Quote Link to comment Share on other sites More sharing options...
nipper Posted August 31, 2007 Share Posted August 31, 2007 1/2 hour will wipe out the learned settings (not that it matters). It actually may be as short as a minute to reset the light, but i know its not 30 minutes Quote Link to comment Share on other sites More sharing options...
jon38iowa Posted August 31, 2007 Author Share Posted August 31, 2007 1/2 hour will wipe out the learned settings (not that it matters). It actually may be as short as a minute to reset the light, but i know its not 30 minutes In that case, I'll try your way first. Quote Link to comment Share on other sites More sharing options...
86BRATMAN Posted August 31, 2007 Share Posted August 31, 2007 You can run it for a few cycles and let it see that the maf is working and the light will go back off. It will still store the code in memory, but it won't be lighting th cel any more. Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted August 31, 2007 Share Posted August 31, 2007 Some Subaru years/models can have a rough idle and CEL/MIL I think if the battery is not left disconnected long enough. I forget the details; something about erroneous data being in the memory. There's an article on EndWrench about it. Quote Link to comment Share on other sites More sharing options...
Cougar Posted August 31, 2007 Share Posted August 31, 2007 You can run it for a few cycles and let it see that the maf is working and the light will go back off. It will still store the code in memory, but it won't be lighting th cel any more. I think 86's way of doing this is better. Just let the system turn the light out. If everyting is ok it will go out after a number of drive cycles. Some codes will go out immediately if the problem has cleared. By removing the battery, the car will have to relearn conditions of the engine but this isn't a bid deal unless you need to have an IM test done very soon. The monitors will need to relearn also and will take some time to do that normally. If there aren't enough monitors set the testing will stop and you will have to drive longer to allow the computer to set more monitors. This info is more related to OBD2 type systems than type 1. Quote Link to comment Share on other sites More sharing options...
OB99W Posted September 1, 2007 Share Posted September 1, 2007 Some Subaru years/models can have a rough idle and CEL/MIL I think if the battery is not left disconnected long enough. [...]There's an article on EndWrench about it. http://endwrench.com/images/pdfs/RoughIdle.pdf Quote Link to comment Share on other sites More sharing options...
jon38iowa Posted September 1, 2007 Author Share Posted September 1, 2007 http://endwrench.com/images/pdfs/RoughIdle.pdf Did the disconnect,30 minutes. All is back to normal. Thanks again. Quote Link to comment Share on other sites More sharing options...
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