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2001 MK4 1.7DTi Not Starting After Replacing the Oil Cooler

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Hi All

Hope someone can point me in the right direction on a problem we have with a 2001 Astra, 1.7DTi. My nephew has just replaced his oil cooler unit and in order to get better access removed the cables that go into the ECU. I believe the battery was still connected when he did this but later disconnected the battery to put it on charge. Since putting it all back together, the car will turnover but won't start.

Do you lose the security code in the ECU or something if you disconnect it? Also, what kind of engine diagnostic scanner do you need for these Astra G's? I have a http://www.autelscanner.com/products...MS309_749.html but it won't connect.

Any help will be appreciated.

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