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    Posted by Mike Walker on August 31, 2004, 8:35 am, in reply to "VECTRA 1.6 X16XEL 1997 MULTEC F PO340 CAM SENSOR "

    This has been covered in the archives before. The cam-sensor signal is not a square wave but a modulated RF (high frequency) signal. It is difficult to test the quality of this signal using normal automotive type oscilloscopes it requires a digital scope with very high sampling rates to correctly interpret the signal. This fault code is often produced when there is a timing error between the cam and crank signals or there is backlash in the system. It is usually neccesary to replace the tensioner whenever a belt is replaced for example.

    Link: http://www.atpelectronics.co.uk

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