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Old 22 Nov 2007, 05:03 PM   #1 (permalink)
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Question warning light

hiya. ive got a problem with my impreza. the check engine warning light has started coming on sometimes. it doesnt do it all the time and it only comes on for about 30 seconds then goes off then it comes on again for about the same time again and keeps on doin this until the engine has warmed up totally, then the light doesnt come on again. Has any1 got any ideas on what is causing the light to come on and how to fix what ever the problem is?

Any help atall would be thankfully recieved. Cheers

Last edited by rich; 22 Nov 2007 at 08:37 PM.
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Old 23 Nov 2007, 09:14 AM   #2 (permalink)
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think the ecu stores the fault codes so can find out what it is if you can get laptop plugged in and theres your answer
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Old 23 Nov 2007, 12:43 PM   #3 (permalink)
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Talking problem sorted

ive got the problem sorted now cheers. it needed a new knock sensor. cheers tidgy
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Old 23 Nov 2007, 07:21 PM   #4 (permalink)
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Quote:
Originally Posted by rich View Post
ive got the problem sorted now cheers. it needed a new knock sensor. cheers tidgy
Don't know if you found out this way, but there are 2 black connectors under the steering column which you connect together and you then turn the ignition on, (not the engine), and the check engine light will perform certain flashes. 1 second flashes count as 10, and quick consecutive flashed count as 1 each. I had a knackered coolant temp sensor (code 21), on mine.

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Old 23 Nov 2007, 07:47 PM   #5 (permalink)
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above only works on pre'00 cars..............
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Old 23 Nov 2007, 07:48 PM   #6 (permalink)
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yeah thts the same way i found out. its pretty handy 2 no how 2 do tht. cheers scotty
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Old 23 Nov 2007, 07:59 PM   #7 (permalink)
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my impreza is a 99 so it worked on that. but forgive me if im being thick but why doesnt it work on the new models?
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Old 24 Nov 2007, 08:17 AM   #8 (permalink)
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the connectors aren't there, only works via OBD port...........
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Old 24 Nov 2007, 02:30 PM   #9 (permalink)
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o right i see. thanks for that
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