i have OBD CODE OF P0306! on 2007 Pontiac Grand Prix

i have replace coil 20,000 miles ago. due to water pump spraying on it. could it be necessary to replace again?

by in Potwin, KS on November 09, 2012
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
ANSWER by , November 11, 2012
it could be