codes P0354, U2904 and P1922?
F-150, 1999
5.4L

 

P0354 Ignition Coil D Primary/Secondary Circuit Malfunction

 

A search on those codes will get you most of your answers.

 

Here ya go...I hope ya thank me.

P0354..Ignition Coil D Primary/Secondary Circuit malfunction

U2904...Gotta have the Ford Manual

P1922...Manufacturer Control Transmission

The second one is a network Communication code. Could be intermittent or caused by the 1st code. The tranny code could also be tripped from the ignition problem.

Try clearing the codes, and see if all 3 re-appear.

My guess is that it is just a bad coil pack. Start by checking the connection to Coil D and if it is good, replace the coil, reset codes, and pull codes again.

This should do it......

Good luck.....

 

Disregard the network code at first...fix your misfire and go from there.

 

Believe it or not, it is most always good to record then clear codes to see what comes back so old history in not confusing the issue.
It is correct that some faults will trigger the reporting of others because some functions are dependent on others that come before it.