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Old 10-21-2010, 05:34 PM   #1
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P0340 Camshaft Position Sensor

So my Jeep has been acting up again lately when starting it... on the first try, the engine will turn over a couple times real slow like its under a lot of compression and then it'll stop and you'll hear the starter crank without the engine turning over. Today it did that and finally threw a CEL...happened to be heading past my buddy's auto shop moments later so I swung in there and pulled the code off with his code reader.

P0340 - Camshaft Position Sensor A Circuit (Bank 1 or Single Sensor)

Before I spend the $47 to order a new sensor from the dealership...is this the likely cause or is this just an effect of the starting problem?

I also have noticed for months now a loud clicking sound that sounds like a taser arcing while driving...lots of folks claim the camshaft position sensor is the source of that sound, but they usually say you'll feel the sensor "clicking" if you touch it while the engine is running and I never noticed anything. I mainly just don't want to be throwing parts at it...but would like to get it in good working order before it decides to leave me stranded somewhere.

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Old 10-21-2010, 05:59 PM   #2
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Also while I'm thinking about it and so I don't have to create yet another thread today...

Is it normal for my drivetrain to feel so "loose" in gear... this is hard to describe but I'll try to give a good example.

The other day, I was in 2nd gear and just be a prick to my friend...I gunned it over a speed bump and my Jeep started jerking back and forth real hard. It didn't feel or rev like the clutch was slipping and the engine wasn't trying to stall out or anything. It just felt like there was a lot of play between the components connecting the engine to the transmission or the transmission to the wheels. No odd noises or anything like that...just a lot of back and forth jerking. Doesn't seem normal to me...seems like off-roading in a manual would be awfully difficult with it jerking that much.

It does this to some extent in most gears...but second is by far the most noticeable.

I was thinking maybe transmission mount? But I'm clueless to be honest...

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Old 10-22-2010, 01:21 AM   #3
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Dee da dee....
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Old 10-22-2010, 11:30 PM   #4
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Old 10-22-2010, 11:57 PM   #5
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lol my old tj i had they CPS went out on it and i could crank it for days and it wouldnt start. but as soon as i put the new one in it fired right up. dont know if this helps you but its a post haha. and for the jerkyness i dont know what to tell you man maybe it upset the "balance" of the jeep? mine is jerky too.
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Old 10-23-2010, 12:00 AM   #6
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Yes a bad Cam sensor can cause a no start condition

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