3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
Agreed with the coil. Try swapping it to another cylinder and see if the code follows. Try cleaning the gas cap and filler tube mating surfaces with WD40 before you buy another cap. That trick fixed mine.
Here's what I ended up doing. Disconnected the battery, pulled coil on #2 and swapped with #4. Cleaned up gas cap. Re-connected battery. Unhooking the battery cleared the codes. Started up the engine sounded perfect much better than before. Took a short 5 mile maybe 10 minute drive around town. No codes yet. Guess I'll know for sure on my drive to work tomorrow.
I agree with pulling the plug on 2, but there's only one plug and no wires.(4.7) Also, check the connector that plugs into the coil. You may have a frayed wire or a wire may have slipped back in the connector not making good contact.
SPARK PLUG SPARK PLUG SPARK PLUG! lol. i had the same code (although mine is a 5.9) but it was on cylinder 8. all i did was a quick tune up, oil, wires, filters and SPARK PLUGS! i looked at the spark plug and YUP it was BAD.