Car was put on a Carmd code came back po339. CMP sensor or crankshaft position sensor
SOURCE: i am having trouble locating the crankshaft
why has my oil cap on my bmw e46 got sucksion and when running it wont come off
SOURCE: Where is the Crank Sensor '99 BMW 523i E39 Auto
are you sure you need the crankshaft position sensor changed. it is at the back of the engine i believe, but.....
check for a wet ecu first... read the note on e36...
the ecu compartment is under the windshield on the passenger side on E36
you gain acess to it under the hood....
this compartment gets wet, the ecu lays on a flat surface in that
compartment.
the bottom side of the circuit board gets wet and starts corrosion.
remove the ecu, take the bottom plate off, clean the bottom of the circuit
board with alcohol and a soft tooth brush.
you should be able to see the signs of corrosion or conductive build up.
this gunk bridges solder points doing all sort s of wierd things to your
car, including false sensor readings from asc/abs controllers and other
sensors....
all the way to engine failure and worst case burnt and shorted wiring
harness.
I'm on my 3rd ecu, took me and the repair boys a few years to figure this
one out.
BTW: i would get that ecu mounted above that flat surface, use some sort
of standoff to raise it so that it is not laying in the wet.
SOURCE: HELLO, I HAVE TROUBLE CODES PO330,PO340, ON MY
The Cam Position Sensor is a common item to fail. However, the cam positioning mechanism can fail too giving that code.
There are two sensors and the Exhaust Cam Sensor is most common to fail. I always replace both.
Te CKP's are on the top front of the engine next to the cylindrical operation solenoids.
Knock sensors fail too and need checked or correct feedback to ECU with a scanner.
Find a shop near you at http://www.iatn.net/shopfinder/
These engines require regular oil changes with quality synthetic oils and OE filter....not a FRAM or WIX !
Buy only BMW sensors ...aftermarket have high failure rate.
SOURCE: how do i reset the
unless you have a scan tool you can not reset the faults in a BMW even if the check engine light is out there will still be faults stored in the system you have to have a shop clear the code thats the only way. disconnecting the battery will not help in any way i have been a bmw master technician for 10 years now.
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