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Old 10-30-2000, 01:53 PM   #1
Aaron'z 2.5RS
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'98 RS Stock

Question HELP: CE light this morning, gone this afternoon

It was strange this morning, i started the car saw the CE light. I shut the car down and re-started it (like thats going to do anything) and still the CE light was on.
It was on when i went out to lunch too...

!!BUT!!

It was gone when i left work...????????

I had an O2 sensor replaced the last time the CE light came on..??

Any input for anyone before i rase the dead at my dealership....????

Thanks in advance
AaRoN

[This message has been edited by Aaron'z 2.5RS (edited October 30, 2000).]
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Old 10-30-2000, 01:55 PM   #2
Aaron'z 2.5RS
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By-the-way, I forgot to mention it's a MY99.

AaRoN
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Old 10-31-2000, 04:19 AM   #3
Aaron'z 2.5RS
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GUYS.....come on HELP me here

It happned AGAIN this morning, i'm not sure if it'll go away this afternoon, but it happned again.

Time for another O2 sensor i guess.....

Any ideas people...??

AaRoN
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Old 10-31-2000, 06:15 AM   #4
DLC
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It's not necessarily the O2 sensor. There are 30-60 different OBDII sensors and the O2 sensor can only trip one of these.

Take it to the dealer and have them check it out.
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Old 10-31-2000, 06:16 AM   #5
tulit
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Make sure too your gas cap is on tight ;-)
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Old 10-31-2000, 06:21 AM   #6
Nick
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I'd raise the dead at the dealership... cause it's fun and easy!

But seriously... you take care of you car... and unless it's something really silly you're overlooking I would just make it the dealerships problem.

Hey... someone's got to make up for all of us who voided our warranties.

-Nick
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Old 10-31-2000, 06:33 AM   #7
Gambit
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hahahah.... funny. I agree with NickCat. YOu have to raise hell on our behalf!
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Old 10-31-2000, 06:41 AM   #8
Aaron'z 2.5RS
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The problem is i thought once the ECU throws a code it has to be dealer reset.
AaRoN
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Old 10-31-2000, 07:55 AM   #9
rjones
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Unhappy

My MY99 threw a CE light last night for the first time. It's been idling very strangely ever since I put in a gasket and K&N panel filter. I did a reset before going to work this morning, which got rid of the CE light and tamed the idle down a bit. I dunno. Try a reset, maybe it was just a hiccup? Worked for me.
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Old 10-31-2000, 10:04 AM   #10
P.K. Motorsports
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AFIK there are three types of CE light. The first does not put the car into limp-home and can be cleared automatically by the computer, the second does put the car into limp-home but can be cleared automatically, and the third does put the car into limp-home and must be cleared with the Subaru select tool.

An example of the first type would be the CE generated when the difference between the first and second O2 sensors dips below some programmed threshold. I've had these once or twice since improving my catalytic coverter. For an examples of the second type, pull the speed sensor wire from the ECU. You're in limp-home, but as soon as you plug the lead back in it goes away. An example of the third type would be a dead MAF sensor. The third variety are rare.

Resetting the ECU by itself has no effect on CE lights in my limited experience. Rao agreed that from an electronic perspective this should be the case. CE lights are apparently stored in a manner similar to the BIOS settings on your computer, and turning the juice off doesn't make them go away. If it is the clearable sort, then it will go away when the computer does one of its periodic diagnostic checks.
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Old 10-31-2000, 05:29 PM   #11
Aaron'z 2.5RS
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P.K.
Thanks for the insight..!!
The strange part of it all is now it has happned 3 DAYS IN A ROW now. Tonight being the third time it has gone back out, after being on all day.

ODD

AaRoN
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Old 10-31-2000, 05:31 PM   #12
ImprezaRS dot com
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I had a CE light for "low manifold pressure" on my MY00 turbo when I would jack with the AFC settings (i.e. going too low at near idle). This cleared with an ECU reset the next time I got it. At least I assume it was the same problem.
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