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[Astra Mk4/G] [98-04] cam sensor fault /possible ecu

Discussion in 'Astra, Corsa, Zafira, Meriva, Adam, Agila, Tigra & Nova [Includes AstraVan & ComboVan] owners forum' started by paulwol, Jan 6, 2011.

  1. paulwol

    paulwol New Member

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    Hi,
    i have an astra 1.6 8valve z16se engine.
    It has fault code p0340 cam sensor, the cam sensor has been changed twice by the garage and the fault is still there, There is no slack in the belt,

    They tested and there was 5 volts going to the sensor and a signal going back to the ecu but it seem that sometimes it's not recognised.

    Does anybody know if it sounds like the ecu or could there be any other things they've not checked they said it's £250 to send ecu off to get it repaired.
    Are repaired ecu's reliable

    thanks for your help.
    paul
  2. cav TD gls

    cav TD gls Well-Known Member

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    is the timing correct , if the timing was a tooth out then the ecu could recognise it as a fault .
  3. paulwol

    paulwol New Member

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    Thanks for the reply,
    I didn't check the timing because it's had the same belt on for 2 years. Nothing has been done to the timing.
    Does this still sound ok or could it have slipped slightly.
  4. cav TD gls

    cav TD gls Well-Known Member

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    do not overlook anything , if you check it & its ok then at least you have eliminated it from the list of possibles .
  5. paulwol

    paulwol New Member

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    I have booked it in today to get it checked then i will post back with the results, thanks for the help.
  6. marks152

    marks152 Well-Known Member

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    Did they use genuine parts, aftermarket parts often stil bring the light on and show a cam sensor fauult code
  7. paulwol

    paulwol New Member

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    They didn't use genuine parts but tried 2 sensors and there is a signal returned to the ecu, will that prove sensors ok or possibley still sensor.

    thanks for the reply
  8. paulwol

    paulwol New Member

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    The timing has been checked today and was ok
  9. marks152

    marks152 Well-Known Member

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    Id try a genuine sensor, get one from a scrappy

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