jave808

Hi
Over the last 4-6 weeks, I've been getting a P0393 CEL error on my 2007 W211 E280 sedan. Now I've had ALL the camshaft sensors replace by my indy mechanic over 12 months ago. More like 18 months.
They weren't genuine MB sensors, but they weren't ebay cheapies either! Could the sensors have failed again? Or is something else at fault?
I cleared the code about 2-3 weeks ago, and it came back again yesterday.
All advice appreciated.

Plutoe

I dont know where you got that fault as with MB W211 E280 Petrol there are no ECU fault codes for P0366 thru 0404---what does your scanner say or provide a VIN or bla bla

jave808

Hey thanks for your reply.

Here's a photo of my scanner when I had the fault

Plutoe

Found it----the OBD Fault P0393 equals MB 0765 fault which is a short circuit to positive or open circuit in B6\6 left exhaust camshaft hall sensor and there are three guided tests to understand the fault
check actual values
check sensor voltage
check crank cam signals

All of these done with MB XDOS diagnostic system or equal----run away from your last mechanic and find someone with factory or equal diagnostic software, however you may just say FI and install a new MB sensor

jave808

Thank you once again

I actually have access to two local mechanics. One that is nearby and does my basic servicing and another that does have the Mercedes diagnostic equipment.

But what gets me is how the error arises. Like I have cleared the error twice now, and then it returns about 1-2 weeks later. If it was a faulty sensor, wouldn't the error return straight away when I start the engine after clearing the code? That's what gets me. Or can sensors do strange things?

Plutoe

you like I dont have the answers because we have not properly diagnosed the car with a factory or equal diagnostic system---now you can speculate all you want till tasmania rejoins australia ------i choose to spend my time elsewhere

jave808

Ok thank you. I will book my car in for a full diagnostic check and go from there.

jave808

UPDATE: Took my car to a local Euro car specialist and he replaced one of the camshaft position sensors, as all the errors were pointing to it. Car drives fine now. No CEL (fingers crossed).