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Discussion Starter · #1 ·
I have a 1999 Dakota with the 5.2L it is giving me a code
P0340 = camshaft position sensor A
bank 1 malfunction
does this mean that the sensor is bad or is it the camshaft itself?
if it is the sensor, where is it and how do i replace it?
Any help with this matter is greatly apreciated
 

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Welcome!

i would think it was only the sensor. not sure where it would be located. have you found a Haynes manual for your Dakota? its different than mine, mine is for the 2000-2004, but its probably not too far off. i will take a look when i get home
 

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Discussion Starter · #4 ·
Problem solved

Thank you all for your support. I replaced the sensor and the truck runs just like it came out of the factory. The sensor is a dealer only part and coast around $100. It only took about 20 min. to take the old one out and put the new one in, super easy job.
Thank you all for you input.
 

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glad you got it working, good to know its an easy job!
 

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Those camshaft sensors are Solid state "Hall effect" where the chip detects
a magnetic lobe on the camshaft and produces a pulse for every cylinder
to the PCM for ignition timing. These have been known to go "squirrely"
with funny failure modes. My son-in-law had a 99 Ram 318 V8 that developed
a weird problem where it would start up ok when cold..run for 10-15 minutes
and then shut down without any PCM codes. Then you had to wait for about
40 minutes for the engine to cool down before it would start and the whole
failure mode would repeat after 10-15 minutes of running, again. It was
so unreliable that it had to be towed to the repair shop.

It's possible that the auto-shutdown relay was doing (stop the engine running).
this because the PCM will operate this relay in the Dakota, if it detects a failure
in the crankshaft sensor or the camshaft sensor. The ASD (Auto Shut Down) relay
cuts the ignition coil 12v and shuts down the fuel injector operation.

Replacing the camshaft sensor fixed that intermittent run problem.
Because of that, I carry a spare in my truck..like the spare wheel bearing
hub, and a spare injector.
 
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