my 01 psd started missing and threw a cel, i scanned it to find a p1316 code for ignition diagnostic monitor code detected, ran my contribution test and #6 failed, ran injector buzz and #6 failed, removed idm to find it tag that says it was replaced in 07 with a reman, but i did notice there was a plug or something missing on the back of it because i can see the circuit board threw a small hole, i traced the wiring up to the valvecover and didnt find any damage, removed valve cover and checked the rest of the wiring and did not find any damage and everything was plugged in, could it be a bad module? hard to believe it only lasted 2 years.