I recently replaced my stock bulbs w/xenon filled aftermarkets bulbs. The passenger side bulb seemed to "die"......it only glowed about half that of the driver's side. I put the stock bulbs back in but now the driver's side bulb seems to be dead!
At the same time, my Service Engine Soon light came on. I've checked the gascap and filled up with premium gas....still on.

Any help is greatly appreciated!

Stephen