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How do I troubleshoot these codes p0202,p1294,p2149 on a 2005 Duramax.

I have had it at a dealer and they could not fix it, the problem has gotten worse. If i wiggle and mess with the wiring harness mainly at the two main connections I can drive it sometimes all day with no problem. Next morning won\'t run throws code, puts itself into limp mode. Almost seems like it is a broken wire or bad connection, have inspected and cleaned the connections.

Vehicle: 2005 Chevrolet Silverado 2500HD 6.6 Duramax
asked May 18, 2012 by anonymous

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