The valve cover gaskets may leak oil into the spark plug wells, shorting out the spark plugs, causing a misfire, and illuminating the Check Engine Light. Commonly the spark plugs and ignition coils or wires will require replacement, along with resealing the valve cover to correct this concern.
Resources for the Repair and Maintenance of your 2003 Ford Thunderbird
2003 Ford Thunderbird
2003 Ford Thunderbird Problems
There may be an extended warranty on the ignition coils - see your Ford Dealer for more information-Thanks John B for this information!
Water or oil may enter into the ignition coil cover and the spark plug bore, causing a misfire and illuminating the Check Engine Light. A coil with improved water and oil sealing is available and should be installed.
2003 Ford Thunderbird Questions and Answers
I have no flashers. Period. What causes that.
after driving the car a while the car goes into limp mode and a wrench light comes on what is the problem
Dealer tells me my heated seat coils on my 2003 Thunderbird are shorted out. He wants 600.00 to fix them. Is this a job that I could do at home?
it seems to do it after ive driven it a ways. it never does it right away. It doesnt do it going at higher speeds like above 50. only like 20-30ish. had a thought...i know it has a steering mec...