I recently bought this car after it was left without driving for 6 months. A few weeks have passed and it threw the codes P2015 Intake Manifold Runner Position Sensor/ Switch Circuit range/ Performance Bank 1a and P2016 Intake manifold Runner Position Sensor / Switch Circuit Low Bank 1a. Has anyone had the same problem or know where to start looking? I can hear a minimal air leaking sound in the intake side of the engine bay but at this point I'm not even sure if that's normal or just me imagining things. I would appreciate any help!

 

I dont have that engine so im not much help. But if you think you are hearing air leaking maybe you have a vacuum leak somewhere? Can you try and trace where you are hearing the noise from?

 

Yea I didn't wanna take the car apart but it seems like that's gonna be the way to go. Also do you recommend any OBDII scanner specifically for Mercedes. This is my first Mercedes and the scanner I have is too generic. Thank you!

 

Nothing wrong with a generic OBD scanner, i was able to diagnose and fix my Mercedes once and my fathers Chevy truck with a $15 scanner before. But I got lucky both times and it was simple fix, happened to be a faulty purge valve both times. What a coincidence. The scanner showed a generic code so i searched online for most possible cause. Just not as detailed as a scanner with vehicle specific software.

I really cant recommend one over the other since i have little to no experience with scanners in the first place.

For me I figured a scanner that is bi-directional, scans all systems, can run system tests and gives real time data is all id ever need. I know one trip to the dealer for them to scan the car is expensive so i figured $200 budget is worth the cost of a scanner. You may have more to spend.

I bought the Foxwell NT730 scanner. I havent really used it since nothings broken but I played around with it and it seems to do alot of things. Before i plugged in the Foxwell scanner i did check and erase any codes showing, but when I hooked the Foxwell up it had a bunch of other stored codes. So it does give alot more detailed info. One thing i really wanted it for is to read the transmission fluid temp since i plan of servicing the trans myself.

I like the Foxwell because its free lifetime updates. There have been two updates to the software so far since owning it the past year. Plus it works as a basic scanner for other cars as well, i read check engine codes with it on a neighbors Jeep. Then if i want to upgrade to more detailed Jeep software its only around $60 to download it to the unit.

Id look for one that has Mercedes software obviously, full system check, bi-directional, free updates.

icarsoft. Launch. Foxwell. Autel.

 

C250 air leaking at intake side. Can be a cracked hose/pipe somewhere. Ive seen a few threads where this happened. Should be easy to visually check.

 

@hbrd as Tim suggested visually inspect the intake piping. It’s ALL plastic.

check to make sure the air filter housing is seating correctly over the hooks/clips that it locks into. Do you know if any previous work was done on the intake side of the engine before you purchased and it sat?

sometimes the air oil separator (AOS) pipe can crack. OR a sensor came loose or someone didn’t put a sensor all the way in.

possibly a vacuum line. There is a vacuum line that connect to the throttle body in the front. One also runs across the top of the engine. Ensure those are all tight and not leaking or have any punctures.

I would start with an inspection and see if anything is cracked, loose, or not seating properly.


ant

 

Thank you! I'll def be checking those out for any leaks. And no, I'm not sure the previous owner did anything to the car. He was the original owner and every service he ever did was at Mercedes.

 

Sorry, but I have to disagree with Tim on this one. Generic scanners are virtually worthless on Mercedes. Worse, they can point to misleading information. So, at least search for a code as it pertains to Mercedes. And a generic OBD scanner is not going to give you information about other components that may be faulty.

I think Tim uses a Foxwell scanner, but the LAUNCH Creader Elite 2.0 BENZ is a popular one on these forums because it does allow limited coding of modules. A generic OBD scanner will not. AND, you can add other brands of cars through the Mall. I have added Honda/Acura and VW/Audi to mine.