P04F1 actually means EVAP System Low Purge Flow Detected. I assume your scanner simply has an incorrect data base of fault descriptions. Search Honda's TSB 21-081, this TSB describes a "possible" cause due to electronic interference. Of course it could also be just a bad purge solenoid or something more mundane than electronic interference. You need to eliminate all normal causes for this DTC before even considering radio interference.

 

I saw that bulletin before and followed the instructions on installing the sub cord. It did not clear the cel light though. I have installed a new purge valve as well that I tested and is getting good vacuum. That did not solve the problem either. I hooked up a live data scanner and found that the car was running a little rich. I thought it might be fuel injectors in that case.The fuel rail pressure was getting around 1500psi at 2400rpms. Not sure if that ls normal or low range though?

 

Just to be sure, check this hose to make sure it's attached to the barb on the intake tube and the barb is not broken. It tends to get over looked as a possible cause. There are actually two circuits that create a vacuum to draw vapors from the canister. The intake manifold is one and the other is used while under turbo boost is a venturi arrangement

 

Ok. I will check it tomorrow and post what I find. Thanks for the suggestion.