hey guys new to the forum and ive been working my a$$ off on this truck hope you can help me..
P0357
P1406
these are the codes i have on my truck
things i have done
changed the DPFE AND hoses with correct hoses too!
changed ALL spark plugs with motocraft ones
changed cyl 7s COP
cleaned air filter (K&N)
at first the truck was missing terribly felt like i was riding a semi tame bull, it feels normal now but im still getting these codes.. if anyone has any suggestions id be glad to hear them

 

Did you reset the PCM?

 

by reset the PCM do you mean unplugging the battery? if so yes, if you mean literally reflashing the pcm or something then no.

 

Are you using a code reader to know it's the same codes returning after clearing them out?
Hard to believe the 1407 code returned after you replaced the DPFE hoses.
Be sure what conditions you really have because a 357 code will be a sure misfire on cylinder 7 if it's really the case because of [how it is detected] it can't be a false indication.
If the 357 returns you either have a harness issue or the PCM driver is faulty assuming the coil is good.
This is why the PCM should be cleared of codes or your just looking at old history and getting confused..
Good luck..

 

yes im using a code reader, yes i did have the 1407 code before swapping out the DPFE and hoses, yes i still have the 357 code and i have changed the cop spark plugs and dpfe and its still on after i did all that. so i assume that i do just need to reset the PCM then. but how do i do that? i left the battery terminals unhooked all night and STILL had those codes pop up (checked with a code reader) the next morning when i hooked it up and turned it on so what other way is there to reset the pcm?

 

Codes in OBD 2 System can not be cleared by disconnecting the battery. They must be cleared with the scan tool.Code will clear itself after 3 successful "Trips",meaning the monitor that set the code has run. May take several days of driving to achieve. You can look up the conditions(service manual- a real one not a Clymers) required to set the code and drive the vehicle in these parameters.

 

Or here:

General info:

http://www.motorcraftservice.com

Specific to yer Model Year:

==> http://www.motorcraftservice.com/vdi...f/obdsm208.pdf

MGD

 

I disagree.

 

I was going to give it a "Nonsense!" response.


What will clear the KAM. If the codes are coming back IMMEDIATELY, then you have a "hard" fault as Bluegrass suggested.

 

If your at a point you can't get past, a Scanner needs to be used to look at the misfire monitor for cylinder 7 to confirm the misfire..
If it shows a high count in a short time you still have the issue.
After doing a clear with a tool the PCM goes into a complete new diagnostic of all systems depending on the conditions it starts from such as hot or cold and how long is sat cold etc. because the PCM keeps track of a lot of parameters, something like the NSA you been hearing about.
Even doing a clear with no codes present causes the PCM to go into new diagnostics.
Clearing and rebooting by power down by either battery or removing the KAM fuse, only takes less than one minute not hours.
.
The P0357 code is a failure detected by the PCM of the Primary side of the coil circuit. Changing the spark plug would not affect this code.
.
What you have is power to the coil that is common to all coils from the same fused source.
The PCM 'ground' switches the coil through a coil driver solid state switch in the PCM.
If the power to the coil is missing, the coil is open, the harness to the PCM is open or the PCM switch is faulty, the PCM separate diagnostic monitor program detects this as a change in {expected} current flow signature it is equipped to recognize. If he signature does not meet the
.
Sounds complicated? It is, but this is the world you now live in.
Hope it helps.
Good luck.

 

hey guys thanks for all the help, the codes actually disappeared this morning, after 8 days with them on and everything being replaced they finally went away..