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Starnge CEL behaviour!!!

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Old 23 June 2003, 11:03 PM
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RON
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Guy's,
I have a decatted my00, with a dawes and filter, the CEL has not come on for at least 6 months, but, I just took a leisurely drive to town, and it came on twice, an even gentler few miles and it goes out. So, any ideas??

Also, which plugs do I put together under the dash to get the error code tp show??

Ta in advance.

Ron.
Old 23 June 2003, 11:55 PM
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have a look here

Sounds like a sensor going out of range and then back in when you drive it slowly.. MAF or Lambda at a guess..

Take it easy until sorted.

JGM
Old 24 June 2003, 12:12 AM
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TA,
Do I need to connect both pairs of connectors to do just the diagnostic test then??
Old 24 June 2003, 12:28 AM
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Yes..

Connect them both, turn immobiliser off, turn on ignition (don;t start engine yet), place foot to the floor on accelerator, back to half throttle and hold for a bit (I do 30seconds), foot off accelerator, start engine and drive.. just drive it slowly..
you will get a flash on the CEL after a couple of minutes or less.. either the ok code, or an error code. Disconnect plugs.

JGM
Old 24 June 2003, 03:04 PM
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Dark Blue Mark
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Ron,

Glen had this and it was the 02 sensor.

MB
Old 24 June 2003, 03:43 PM
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Question

Hi Ron

JGM just described how to reset ecu

To get the error codes just connect the two black connectors, switch the ignition on, immobolizer off etc the cel light will flash like morse code this is the error code

if your around poole if you bring it over i'll tell you

Mike (Modified front end WRX)
Old 24 June 2003, 08:42 PM
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JGM just described how to reset ecu
Very true.. sorry bit tired when I wrote that..

error codes are just one of the connectors, I think it is black ones.. says on that website..

Am sorry I must have miss ready your replace RON.

JGM
Old 24 June 2003, 10:51 PM
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Thanks guy's, I'll try to get round to it tomorrow.
Old 24 June 2003, 11:22 PM
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Just in case it is the O2 sensor, where is it, and, can I change it myself??

Ta.
Old 25 June 2003, 08:57 AM
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Question

Sensor is situated at the top of the downpipe, just by the turbo

Shouldn't be too hard to do, I'll let you know at the end of the week as my replacement should be here by then!

Mike
Old 25 June 2003, 04:37 PM
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Mike,
I always thought that one was the lambda???
Old 25 June 2003, 04:39 PM
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Thumbs up

I always thought that one was the lambda???
They are different names for the same thing
Old 25 June 2003, 04:50 PM
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Thanks,
I've just done the check, it flashes loads, it tells me code 11, (crank sensor) 12, (starter switch) 32 (O2 sensor) and 53, (fuel pump or circuit)
So, it would seem to me, that the fact that the car rub=ns fine, could just mean that the )2 sensor need changing, as, if all the others were wrong, it wouldn't run, would it?

As you can tell, this is all pretty new to me, I could strip and rebuild a Mini in my sleep, but not a Scooby!!

Ron.
Old 25 June 2003, 09:16 PM
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reset the ecu so the codes clear and see if it reoccurs and what code you get then
Old 25 June 2003, 09:53 PM
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Too dark now, will do it tomorrow.
Ta!
Old 25 June 2003, 11:30 PM
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just roughly, how much would a new O2 sensor cost??
Old 25 June 2003, 11:45 PM
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Cool

Bought mine from a company on the web.

I think there site is down at the mo. Will post url when its working again

Depending on how many wires yours has it'll cost between £25 and £35ish

Mike
Old 26 June 2003, 12:16 AM
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Cheers mate!
Old 26 June 2003, 12:31 PM
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Cool

Website is back on now!

O2 Sensors

Mike
Old 26 June 2003, 12:43 PM
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Wink

RON, find someone with a SECS monitor... That'll tell ya exactly which codes are appearing. (I never could count the flashes properly!).

Their website has tech info downloads in the top right hand link, giving full details of the error codes and their meaning.

Wonder who did their website?

Squizz.
Old 26 June 2003, 06:37 PM
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Just done a reset, shows no errors, so til next time, it's ok!!

Cheers for all advise!

Ta
Ron.
Old 26 June 2003, 08:50 PM
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Jolly good.. just keep an eye on it.. now you know how to check for codes you can check for them once in a while.

JGM
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