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Engine turns over but wont start p1517 code logged in engine ecu

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Main Relay Malfunction. This one could be tricky. Could be as simple as that main relay is bad. If it was it could cause an intermittent no start. It is located in your ECM box at the base of your windshield. I don't remember off the top of my head WHICH one in there it is. And there are 3 or 4 sometimes. So you will have to figure out which one. Take it out. There is a diagram on it. Test it according to the relay diagram. If it works then it might be something different. I have seen a lot of other problems (bad ground, bad battery, ignition switch, and more) cause that relay fault. So it can be tricky.

Posted on Mar 31, 2011

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