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420A 2gNT intermittent loss of cmp or ckp

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safirenside

10+ Year Contributor
170
0
Jan 28, 2011
houston, Texas
alright so i have a couple codes that poped up
P1391 intermittent loss of cmp or ckp
P1390 timing has skiped one tooth or more

i was wondering what the signal voltage is suppose to be for the cam sensor and the crank sensor

i was reading around 13 volts for the cam sensor and 1.4 volts on the crank

also forgot to mention my timing is dead on
 
Im actually havin the same exact problem with mine. Except mine runs roughs when i rev it and after i drive for a minute it will shutt off and not start up for a couple mins. If i find anything out ill let ya know
 
I was getting codes like these as well on my 420a and i replaced all the sensors that it said were messed up. Turns out it was just my IAC. I dont know why the computer threw a code for cmp and ckp. I cant remember what the voltage is supposed to be for those two but i will check in my chilton when i get home
 
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