I just started having a misfire problem today, finally threw a check engine light and got a 303 Misfire on Cyl 3. It's probably the COP, had this problem last year and that fixed it. There were 2 more codes that I cannot find a reference to anywhere though and thought I might be able to find some help here....

P04DF Auxilliary Fuel/Air Metering
P2C45 Auxilliary Emission Controls

Anyone have a clue what could be throwing these 2 codes? O2 sensors maybe?

Thanks in advance

Tim:confused:

Wow... I've never heard of those other two codes before...

From what I can see in alldata these codes do not exist.

Yeah, I've been through alldata and called Lincoln as well and talked to a mech there and he said he's never heard of those codes either. I cleared the misfire code and those 2 codes came up with a CEL. I'll change the COP and Boot since I have extras and see what happens. Seems the damn car only has problems when a snowstorm is on the way. LOL

Mine just had nearly 10 codes or more and it felt like a misfire after warming up. Not sure how yours is acting but all mine turned out to be was the TPS was faulty. Running good now.

I just started having a misfire problem today, finally threw a check engine light and got a 303 Misfire on Cyl 3. It's probably the COP, had this problem last year and that fixed it. There were 2 more codes that I cannot find a reference to anywhere though and thought I might be able to find some help here....

P04DF Auxilliary Fuel/Air Metering
P2C45 Auxilliary Emission Controls

Anyone have a clue what could be throwing these 2 codes? O2 sensors maybe?

Thanks in advance

Tim:confused:

What type of device did you use to get these codes? And how did you get these descriptions? Not only does the numerical value match the OBDII format the code description don't match anything either.