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Audi A2 1.4 FDi ATL 2004 - Code P3008 cam position sensor not a plausible signal #

Posted by Sean Hemming on May 9, 2015, 1:19 pm

Year of Manufacture *: 2004
Engine Size and Code *: 1.4 ATL
( Optional) Fault Codes: P3008

HI all

We have a P3008 fault code "cam position sensor not a plausible signal". Code appeared after head gasket replacement. If the sensor is unplugged the car will run, if its plugged in it wont start. Timing was pinned and we've double checked it. Replaced sensor still no difference. We've check power & ground to the sensor & scoped the signal wire all ok.

Any ideas would be much appreciated.

Thanks.

Re: Audi A2 1.4TDi

Posted by aidan birley <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2879' width='330' height='300' border=0 style='border:none;'> on May 9, 2015, 2:12 pm, in reply to "Audi A2 1.4TDi"
Aidan Birley

Hi

Ideally you need to scope cam and crank together and compare with a known good.

Any chance that the phonic wheel has been damaged?

Cheers Aidan

Re: Audi A2 1.4TDi

Posted by sean <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat3654' width='330' height='300' border=0 style='border:none;'> on May 9, 2015, 6:20 pm, in reply to "Re: Audi A2 1.4TDi"
Sean Hemming

Thanks for reply.

I checked the wheel & it all looked good. Was thinking of scoping cam & crank but if my timing is not out what else would that tell me?

Re: Audi A2 1.4TDi

Hi Sean

There must be something in the signal from the cam / crank sensor that the ECU does not find correct, comparing cam / crank from yours with a known good one is the best way of spotting the problem ( as you have checked the obvious things).

problem is finding a known good one but if you post yours here someone may be able to help.

Cheers Aidan

Re: Audi A2 1.4TDi

Posted by Glen Strachan <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat1463' width='330' height='300' border=0 style='border:none;'> on May 11, 2015, 12:50 pm, in reply to "Re: Audi A2 1.4TDi"

Not sure what scope you use, but the new version of Pico gives the ability to upload images/download known good ones

Re: Audi A2 1.4TDi

Posted by sean <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat3654' width='330' height='300' border=0 style='border:none;'> on May 12, 2015, 9:11 am, in reply to "Re: Audi A2 1.4TDi"
Sean Hemming

Hi I have pico about a year old. We definitely look at that. many thanks for the reply.

Re: Audi A2 1.4TDi

Posted by Sean Hemming on May 12, 2015, 9:42 am, in reply to "Re: Audi A2 1.4TDi"
Edited by board administrator May 13, 2015, 11:34 am

Nothing on Pico. So if anyone has a good cam/crank that would be great.

I cant see how to upload the cam/crank waveform of the problem car I've got?

Re: Audi A2 1.4TDi

Posted by aidan birley <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT2879' width='330' height='300' border=0 style='border:none;'> on May 12, 2015, 1:29 pm, in reply to "Re: Audi A2 1.4TDi"
Aidan Birley

Hi Sean

http://members.boardhost.com/ukautotalk12/msg/1354016719.top

for Info on uploading

Aidan

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