i have gust had new alternator fitted by saab and my engine managment light as come on why ?
Mar 10, 2011 at 11:46 AM
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CARADIODOC
✓Experienced Mechanic
34,412 POSTS
The Engine Computer detected a problem and set a diagnostic fault code in memory. Have the code(s) read. They will lead you to the circuit or system with the problem, not necessarily a defective part. Some auto parts stores will read the codes for you for free but for a Saab you might have to go to the dealer.