Subaru forester stb ecu codes

[neodowd]

Hi guys

got a few questions for all you knowledgeable people out there. I have a subaru forester stb 1999 which has been converted to manual from automatic.

The cel light comes on intermittently for a few minutes a couple of times a day. The cars drives well with no noticeable problems, Now I checked the codes with just the black plugs and it came up with 5 codes correct me if I'm wrong but are the black plugs just stored codes not current ones? Then I plugged both green and black plugs and took it for a drive after a few minutes it came up with three codes. the codes are as follows

Black plugs (stored codes???)

12-starter switch

22-knock sensor

23-mass air flow sensor

24-idle air control valve

32-oxygen sensor

Black&green plugs (current codes???)

12-starter switch

32-oxygen sensor

51-park/neutral position swith AT (mine used to be an auto)

Questions

Is the black plug just stored codes and how is they are not cleared when both green and black are plugged in?

Out of the three codes I got with both black and green plugs which one would most likely give you an intermittent cel which does

not appear to effect car much?

Any opinions or theories would be appreciated.

Thanks

[nztintin]

http://www.clubsub.org.nz/forum/index.php/topic,67.0.html

try search, it works....

[neodowd]

Yea thanks, I already read through that before posting my questions but nothing really answers what I want to know.

And I also tried to unhook negative off battery to clear stored codes but the alarm goes off and I don't have key to turn off siren.

Does anyone know how to unhook battery without activating alarm, I have tried with alarm off and ignition on and the siren still goes off :-(

[nztintin]

did you follow the reset ecu instructions here? http://homepages.ihug.co.nz/~ccgrant/celcheck.htm

I've done it plenty of times and it works in my 98 forester stb.

O2 sensor will cause intermittent cel light with no noticeable fault, just an increase in fuel use. I have this issue and have done since i got the car 5 years ago.

your alarm will have a feature to stop a thief from disconnecting your battery, so you either need to get a key for the alarm or just cover the siren with a pillow to hide the noise

I think you need yo go through and eliminate the faults one by one. possibly the AT one first cause i think i remeber something about another member having random cel lights after changing to manual, possibly get a manual ecu?

[neodowd]

Yep I did follow instructions to reset ecu. I think your right about getting a manual ecu I might try and source one. Cheers for your help Mate