P0352
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From: alberta
P0352
Hi there, my 99f150 ford started idling rough yesterday after a 2 hour trailer tow.Put the truck on the code reader and po352 came up saying "Ignition Coil B Primary/Secondary Circuit Malfunction. I would appreciate any advice you can give me on what this means and how to go about solving this isssue.
Thank you very much and keep up the great work
codfish
Thank you very much and keep up the great work
codfish
Lead Driver
Joined: Sep 2006
Posts: 7,907
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The code refers to cylinder #2.
There is an open circuit detected.
Can be one of the following,
Open coil, test with an ohm meter.
Coil plug,
PCM internal switch for that cylinder is faulty not pulsing the coil with a ground signal.
The harness between the coil plug and PCM is open.
Testing the PCM and harness, use an ohm meter to see if the PCM puts out a ground to the coil, when cranking over.
Don't drive the truck with this condition because that cylinder is passing raw gas to the cats on that bank and can overheat them causing another hassle with replacing that cat assembly if you get a code 420 later on..
Good luck.
There is an open circuit detected.
Can be one of the following,
Open coil, test with an ohm meter.
Coil plug,
PCM internal switch for that cylinder is faulty not pulsing the coil with a ground signal.
The harness between the coil plug and PCM is open.
Testing the PCM and harness, use an ohm meter to see if the PCM puts out a ground to the coil, when cranking over.
Don't drive the truck with this condition because that cylinder is passing raw gas to the cats on that bank and can overheat them causing another hassle with replacing that cat assembly if you get a code 420 later on..
Good luck.
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Joined: Feb 2004
Posts: 15
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From: alberta
Thanks alot for the reply Bluegrass it helps me alot.I have the coils ordered and was wondering if i can move the truck before i put the new coils on as the engine warning light now is not on but there is still a miss in the truck. I only have to move the truck about 5 miles to park her for a week , then when i get back from work im planning on replacing the whole 8 coils now as the truck has roughly 150000 miles on it.
Lead Driver
Joined: Sep 2006
Posts: 7,907
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As discribed about the cylinder passing raw gas into the cat for that side, go slow and take a chance if you feel you must..
If you begin to smell anything it's the cats at about 900° and a dull red.
This will melt the coated substrate and ruin the cat besides causing a blockage.
If you need to replace the right side assembly, take a good look at it and be sure the replacement has the OX sensor bungs in the right locations so there is no interference.
One well known exhaust maker is selling improperly assembled assemblies for these trucks that you cannot use unless you go to a muffler shop and have the rear cat cut and rotated so it's OX sensor has clearance.
They have been notified about it.
I bring you this info because the OEM is over $1700 plus installation.
As these trucks are now older, the aftermarket replacements use a standard size rear cat that likely will last the rest of the trucks life as opposed to the large one used by the OEM that was meant to be large enough to last full life of the vehichle barring anything that goes wrong.
Good luck.
If you begin to smell anything it's the cats at about 900° and a dull red.
This will melt the coated substrate and ruin the cat besides causing a blockage.
If you need to replace the right side assembly, take a good look at it and be sure the replacement has the OX sensor bungs in the right locations so there is no interference.
One well known exhaust maker is selling improperly assembled assemblies for these trucks that you cannot use unless you go to a muffler shop and have the rear cat cut and rotated so it's OX sensor has clearance.
They have been notified about it.
I bring you this info because the OEM is over $1700 plus installation.
As these trucks are now older, the aftermarket replacements use a standard size rear cat that likely will last the rest of the trucks life as opposed to the large one used by the OEM that was meant to be large enough to last full life of the vehichle barring anything that goes wrong.
Good luck.
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New User
Joined: Feb 2004
Posts: 15
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From: alberta
Low compression number 2 cylinder
Took truck to ford dealership to see what was causing rough idle and was told that number 2 cylinder compression was low by approx 20 percent and when tech attempted to remove sparkplug to inspect he found the threads were damaged and that the truck will require hear removal to inspect for damage. Then was told better to replace cylinder head which will cost approx 4500 upwards, truck in good shape but with age at 1999 not worth that kind of expence. Was told that the spark plug could be shook with your hand it was that loose in the cylinder, anyone know of any other fixes for this issue or is it time to look for another truck as i was hoping to get another couple years out of this truck then get an f150 with the ecoboost.Thaks again for any help
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