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2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 or 4.2 V6 engine
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Old 07-22-2007, 01:49 PM
jcbuck jcbuck is offline
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Code P0354

What Should I replace the COP and the plug or just the COP? Which cylinder is this? Sorry for the dumb questions.
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Old 07-22-2007, 03:39 PM
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P0354 - Ignition Coil D Primary/Secondary Circuit
Description: See the description for DTC P0350.
Possible Causes: See the possible causes for DTC P0350.
Diagnostic Aids: See the diagnostic aids for DTC P0350.
Application Key On Engine Off Key On Engine Running Continuous Memory
Coil-on-plug (COP) ignition testing GO to Pinpoint Test JF. GO to Pinpoint Test JF.
Coil pack ignition testing GO to Pinpoint Test JE. GO to Pinpoint Test JE.

P0350 - Ignition Coil Primary/Secondary Circuit





Description: Each ignition primary circuit is continuously monitored. The test fails when the powertrain control module (PCM) does not receive a valid ignition diagnostic monitor (IDM) pulse signal from the ignition module (integrated in the PCM).
Possible Causes:
  • Open or short in the Ignition START/RUN circuit
  • Open coil driver circuit
  • Coil driver circuit shorted to ground
  • Damaged coil
  • Coil driver circuit shorted to VPWR
Diagnostic Aids: Use the 12-volt non-powered test lamp to verify START/RUN voltage at the ignition coil harness connector.
Check the coil driver circuit for open, short to VPWR, or short to ground.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test JE.


Vehicle Related DTC Cylinder Number Ignition Coil Coil Driver (CD) PCM Pin

F-150, Mark LT P0351 1 A A E17
P0352 2 B D E11
P0353 3 C B E12
P0354 4 D G E14
P0355 5 E F E10
P0356 6 F E E15
P0357 7 G C E16
P0358 8 H H E9

Here's the info on your DTC. You can move the COP to a different cylinder to see if it follows. If it does, then it's probably the coil. If not, there are other things you will need to troubleshoot. The list is a little long as is the troubleshooting procedure. But that's where I would start, move the COP to different cylinder. Let us know what happens...
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Last edited by wildcard30; 07-22-2007 at 03:47 PM.
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Old 07-23-2007, 10:57 AM
jcbuck jcbuck is offline
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Thank you for your help wildcard30. I changed out the # 4 COP to the # 1 position. I went to a different autoparts store and had a guy read the codes. It showed all the COPS 1-4 were bad. (yeah the girl at the first autoparts store didnt know to press the down button to get more codes) So I went back home and did some more searching. Come to find out the wiring harness that controls the COPS was damaged. My local dealer has installed a new harness. Again thanks for the help.

Last edited by jcbuck; 07-23-2007 at 11:06 AM.
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Old 07-23-2007, 12:36 PM
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wildcard30 wildcard30 is offline
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No problem...

What caused the damage to the wiring harness?
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Old 07-23-2007, 01:17 PM
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Rodent damage. Must have happened in the winter months. I can't imagine a rat or squirrel wanting to climb up next to a hot engine in July??? The truck is parked outside and we do live in the woods. I leave it at our barn for several hours at a time so who knows. Never thought I would say I had a rat eat a wiring harness though.
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Old 07-23-2007, 01:51 PM
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At least the "bad harness" was not caused by something related to the truck itself....

Hopefully it did not cost much to fix.
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Old 07-23-2007, 01:51 PM
 
 
 
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