I just started getting a code "P803 H C" on my 2002 Zo6. I looked it up and it shows the error as "P0803 1-4 Upshift Solenoid Control Circuit (M/T)". It comes on right at start up. If I reset it and turn the car off, it will come back on again on restart. I do have a CAGS eliminater on, but it has been on for about 4 months of fairly regular driving. Any thoughts on this?