I need some help! My EGT # 2 is fluctuating back and forth from the normal range to between -86 degrees to 2976 degrees. It will hit the top and bottom temps for a microsecond as it is fluctuating. I have replaced both sensor #2 and #3. I have the following codes - P2084, P20E2, P242B. Additionally the fluctuation is much worse with the key in the off position.
The car is running fine but won't pass emissions inspection.
Thanks for any insight on this problem.