1999 4.6 cobra camshaft position sensor

lovedr79 · December 7th, 2006, 08:34 AM

Hi! just joinded today, had a new 4.6 put in my wifes 1999 cobra, now the computer is throwing the P0340 camshaft position sensor cirsuit malfunction. does this sensor need to be set in time with the new motor or do i need to just put a new sensor? also is there a special alignment tool i need to set this in time? if so anyone have the part numbers? Thanks!

Invictus · December 7th, 2006, 11:38 PM

i guess nobody knows or else they'd have answered your question.. i dont know either but in an attempt to help i'd just change the sensor out and see if it still throws the code. has the car been idling rough or anything out of the ordinary? if not, just change the sensor its behind the power steering reservoir.

yellowfever · December 8th, 2006, 01:46 PM

I had the same problem in my 2002 gt. I replace the camshaft position sensor twice and the code still. To do the long story short, all the problem was the alternator. I do not know the theory behind that but i fixed the problem.

Casper98GT · December 10th, 2006, 04:18 PM

Yellow, its strange you got that problem in youre 2002. Yes the alternator can set a p0340. Sounds strange, but it can happen. First check to see if its plugged in and has a good contact. Check voltage to it, to make sure something didnt get clipped when the engine went in.

lovedr79 · December 11th, 2006, 07:29 AM

thanks! i replaced the sensor, so we will see what happens when my wife drives to work today. i drove it around for about 10 minutes nothing came up. so we will see. i did try to check the old sensor with a volt metere and waving a piece of metal past it i got no voltage spikes. so hopefully that what it was. the alternator does seem to be charging aswell.

lovedr79 · December 11th, 2006, 07:50 AM

well no sooner than i posted my phone rings its my wife, the check engine light is back again. so i guess i will be replacing the alternator

lovedr79 · December 27th, 2006, 10:55 AM

well replaced the alternator, CEL still on. any other suggestuions?

Invictus · December 29th, 2006, 04:22 AM

may want to voltage check the harness plugging into the sensor itself, you may need to take off the power steering resovoir to get to it. make sure its a good connection. and make sure nothing is on the magnet if all checks out i'd try the dealership. does the car idle any different or run sloppy since it threw the code.. its throwing that code for some reason... hmm

lovedr79 · January 2nd, 2007, 10:10 AM

what should that voltage be? we were trying to figure it out this past weekend, but to no avail we didnt figure it out. the car runs fine, idles fine so i am stumped on this one.

December 7th, 2006, 08:34 AM	#1
lovedr79 Newbie Join Date: Dec 2006 Location: Front Royal, Va. Posts: 6	1999 4.6 cobra camshaft position sensor Hi! just joinded today, had a new 4.6 put in my wifes 1999 cobra, now the computer is throwing the P0340 camshaft position sensor cirsuit malfunction. does this sensor need to be set in time with the new motor or do i need to just put a new sensor? also is there a special alignment tool i need to set this in time? if so anyone have the part numbers? Thanks!

December 11th, 2006, 07:29 AM	#5
lovedr79 Newbie Join Date: Dec 2006 Location: Front Royal, Va. Posts: 6	thanks! i replaced the sensor, so we will see what happens when my wife drives to work today. i drove it around for about 10 minutes nothing came up. so we will see. i did try to check the old sensor with a volt metere and waving a piece of metal past it i got no voltage spikes. so hopefully that what it was. the alternator does seem to be charging aswell. __________________ 1999 Cobra convertible 1966 Mustang coupe 289 Run it like you stole it! May the bridges I burn light my way!

December 11th, 2006, 07:50 AM	#6
lovedr79 Newbie Join Date: Dec 2006 Location: Front Royal, Va. Posts: 6	well no sooner than i posted my phone rings its my wife, the check engine light is back again. so i guess i will be replacing the alternator __________________ 1999 Cobra convertible 1966 Mustang coupe 289 Run it like you stole it! May the bridges I burn light my way!

December 27th, 2006, 10:55 AM	#7
lovedr79 Newbie Join Date: Dec 2006 Location: Front Royal, Va. Posts: 6	well replaced the alternator, CEL still on. any other suggestuions? __________________ 1999 Cobra convertible 1966 Mustang coupe 289 Run it like you stole it! May the bridges I burn light my way!

January 2nd, 2007, 10:10 AM	#9
lovedr79 Newbie Join Date: Dec 2006 Location: Front Royal, Va. Posts: 6	what should that voltage be? we were trying to figure it out this past weekend, but to no avail we didnt figure it out. the car runs fine, idles fine so i am stumped on this one. __________________ 1999 Cobra convertible 1966 Mustang coupe 289 Run it like you stole it! May the bridges I burn light my way!

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December 7th, 2006, 11:38 PM	#2
Invictus Hardcore Enthusiast 1999 Mustang Join Date: Jul 2006 Posts: 1,311	i guess nobody knows or else they'd have answered your question.. i dont know either but in an attempt to help i'd just change the sensor out and see if it still throws the code. has the car been idling rough or anything out of the ordinary? if not, just change the sensor its behind the power steering reservoir.

December 8th, 2006, 01:46 PM	#3
yellowfever Newbie Join Date: Oct 2006 Posts: 2	I had the same problem in my 2002 gt. I replace the camshaft position sensor twice and the code still. To do the long story short, all the problem was the alternator. I do not know the theory behind that but i fixed the problem.

December 29th, 2006, 04:22 AM	#8
Invictus Hardcore Enthusiast 1999 Mustang Join Date: Jul 2006 Posts: 1,311	may want to voltage check the harness plugging into the sensor itself, you may need to take off the power steering resovoir to get to it. make sure its a good connection. and make sure nothing is on the magnet if all checks out i'd try the dealership. does the car idle any different or run sloppy since it threw the code.. its throwing that code for some reason... hmm

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