hello all i just replaced a map sensor on a 98 Lumina LTZ . the engine light is back on after a 5 mile ride with the same codes p0108 and p1106 if any one has any suggestions please suggest thank you . ps i will say this dam car was built to beleive i were a toyota i have a 90 corolla gts with 317.000 miles and never ever had any problems i'm amazed with this car chevy has done a great job i even contacted them . it now has 277.000 miles and burns no oil always ready to go were ever and the power of the 3.8 is always there chevy replied to my email by phone and gave me a $100 maintance voucher . I try to maintane my cars well i beleive i could reach 500.000 mile if maintaned properly

I would say start with checking for any loose connections at the MAP plug, test for the +5v reference as well as the ground circuit. Seems like there'* a issue with the wires.

Black Ground
Gray 5 volt reference
Light green MAP sensor signal

i tested yesterday gray 5 votls and light green 12 volt this is with sensor out

am i suposed to have 12 volts on light green