I have an Infiniti Q 45t and recently the check engine light came on - same month I needed state inspection too. Car passed the safety portion but OBDII portion failed. The OBDII diagnostic troble code was P0306 "Cylinder 6 Misfire Detected". The spark plug was fine; was told it needed an Ignition Coil. It was replaced. I was then told I needed to drive the car 75-100 miles and the onboard computer would reset itself. However, when I went to pick up the car, now the TCS/OFF & SLIP indicator lights were on! When I went back inside & spoke to the so-called head mechanic, I was told to drive it and the TCS/SLIPlights would go off within miles. Well it's been 125 miles later and NONE of the lights have gone off. So, my questions are
A) What would cause the TCS/OFF/SLIP lights to come on while changing an ignition coil?
B) Is it true that driving 75-100 miles would reset the onboard computer after replacing the Ignition Coil? (When I called back - after driving +100 miles - I was told they could remove all the warning lights for $125.00)
C) What other possibilities are there for the PO306 to still be on?
D) Besides filing a complaint with DMV, BBB, BCA, AAA what do U suggest I do to resolve ASAP as my car was inspected Dec (failed OBDII) and it's now mid Jan.
Thanks for your anticipated assistance
Monday, January 17th, 2011 AT 3:04 PM