cam sensor
Not much traffic on some of the other forums so thought I would post here to see if anyone can help.
Have a 2000 986 2.7 tiptronic. Getting P1340. From what I have been able to find I should get 5v between pins 1 & 3 with key on and 0v between 2 & 3 with the key off. With key on I get 5v to pin 1 & 3 and 12v to pin 2 & 3 At this point I am actually hoping it is the dme and not wiring. The car does start & run, although it idles rough. Once I get it out it drives fine with the rough idle. I shouldn't see any voltage between pins 2 & 3 with the key on or off right? |
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And yes, I am the same guy that told you the same thing and to stop buying cheap Beck/Arnley cam position sensors and get the real thing on the other forum………………... |
Thanks but the sensor you refer to as junk was installed in bank 2 not bank 1 which is where the code is referring to.
The question I have isn't about the sensor, it's about the voltage readings and if the issue is most likely the dme or wiring. |
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Right now I am looking to just find out if the DME should be putting 12v out on the cam sense pins (19 & 20) with the key on.
I know a bad DME can cause cam sensor, o2 & misfire issues. If someone knows for a fact that these pins should not be putting out 12v with the key on as I suspect or can check theirs when they have a moment that will verify that the issue is with the DME. At the moment neither sensor is hooked up |
The troubleshooting guide says that you should not get battery voltage at pin 19 & 20. However, I believe this is incorrect. I was trying to solve the same code as you and went through probably a similar process. I DID receive battery voltage at pin 19 & 20. Eventually I exposed both sensors, swapped them, the code jumped to the other bank, and I bought a new sensor. 3000 km on the new sensor and all is well.
You can read through my thread here: https://rennlist.com/forums/boxster-and-boxster-s-986-forum/1139864-p0340-camshaft-bank-1-what-could-go-wrong.html I realise that the problem is not always due to a sensor failure, but the impression I got when I started looking into it was that it was never a sensor failure. |
Tried posting a reply yesterday, but it didn't seem to go through.
I can confirm that you SHOULD get battery voltage from pin 19 and 20. The troubleshooting guide that says you should get 0 volts is incorrect. |
Thank you!
My next step is going to be replacing the sensor. Unfortunately though the allen bolt is stripped so I am going to have to drill the head out. Might have to drop the engine cause of the small amount of space, my dewalt is just a little too big to get in there. |
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well considering that isn't what is installed in bank 1 I dont see how it is relevant. That sensor was installed in bank 2, not bank 1 and wasn't even kept in.
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