24Albie

First post and of course I have a problem! Been reading the forums for a while but never really had a reason to post. So, here's the problem:<br />P0019 and check engine light and what I've done.<br />- changed camshaft sensor still no fix...<br />- cleaned all connections to senor and solenoid/magnets<br />- swapped intake and exhaust senors to see if I might have gotten a bad sensor. no luck.<br />What's has me baffled on this is I can erase the code and drive the car for 1-60 miles and no check engine light. Now if I turn engine off and then restart car, get a P0019 within 15 seconds of starting car. Even reset the code, started car(no code), turned car off after 30 seconds, restarted and popped the P0019 in 15 seconds...I would think that if I could drive for an hour and never pop the code that it shouldn't then come up on restart. Any ideas? I replaced all camshaft magnets 50,000 miles ago. Possible Oil Control Valve for exhaust cam? I would think if the magnet had gone bad I would also get a P0025 code.<br />Thanks, Mike

24Albie

Swapped out the magnets from another position. No change, still same issue. Pulled both cam position sensors and rotated engine to 305 to check position of markers. With intake cam dead center the exhaust cam looks to be maybe a half degree rotation off. It's not exactly center like the intake cam. Take it this is an issue. So, what's the next step? I would think if the timing chain was stretched I would have other issues and more codes and I don't see it being a balance shaft issue. Thoughts? Also, car runs great and no change in fuel mileage...

cmriv

either your oil is very dirty or you have a stretched timing chain or worn balance shaft.....

95viper

24Albie

Build date is 06/07, ran the numbers and the engine is after the balance shaft group. As for oil, it's been changed every 10,000 miles with Mobil 1 5w-30 since new and when this started there was only 200 miles since the last change. Crazy thing is I can reset the code, drive the car over a hundred miles and no issue, turn car off and restart and the code pops within 30 seconds. If it was a balance shaft issue would I not also see issues with Bank 1?

konigstiger

DTC 1200 and/or 1208 is/are present in ME-SFI control module. The fault codes are recorded as current and/or stored in the fault memory. When the fault memory is erased and the engine is restarted, the fault codes reoccur immediately. This is due to the positioning of the timing chain driven camshafts relative to the crankshaft and can be caused by a worn sprocket on the balance shaft on engine M272 or by a worn guide (idler) gear for the timing chain on engine M273.

Generic P0019 = MB DTC 1201, 1202, 1203, 1204 constant adjustment of exhaust camshaft of left cylinder bank. Check this http://www.benzworld.org/forums/w204...99-1203-a.html

24Albie

Thanks! Based on the engine number of 272964 30 682277, shouldn't that put me outside the balance shaft gear issues?

cmriv

not necessarily. You could have an adjuster issue, chain issue or actual balance shaft issue.

remove hall sensors and crank engine over to 305 degrees on crank pulley. inspect alignment of etchings through cam/hall sensor holes.

1200/1208 codes can be erased but after a drive cycle and cool down will re-appear because cam timing is retarded....

konigstiger

Yes, clean point is 30 468993 just wanted to clarify codes.

24Albie

Thanks all! Still learning this engine. Guess what I will do next is remove the cam position sensors again, rotate to 305 and double check alignment, was somewhat iffy on the exhaust alignment because of the angle I was looking from. Will use my phone this time to take a picture from straight on. As part of the learning phase here I could use a little schooling. If the timing chain was stretched, or there was a balance shaft issue, or even an adjuster issue wouldn't I be seeing codes for Bank 1 eventually. With it being a one piece timing chain it somewhat baffles me that I am only getting the P0019 code. Granted I am use a low rent Autel scanner vice STAR diagnostics....could the oil control valve for the exhaust cam come into play?

Koyafresh

i am having the same code. did you end up finding your solution ? if so please share.

Al Golzari

Hi all:
*First, for those with the balance shaft problem till about 2006-2007, please NOTE this won't help you. I don't want to waste your time.*

I have a W204 (2010 C300) and wanted to share that I finally solved the dreaded p0019 problem that happens on C and E classes of this generation. I'll give you the answer UPFRONT and save you time and share some supporting info afterwards. Take out your oil control valve for the exhaust left and clean the heck out of it with parts cleaner and then reinstall. Also spray parts cleaner into the "hole." Since I was cleaning an internal engine component and also sprayed something into the engine, I used parts/carb cleaner, not brake clean. They may be similar, but I didn't want to take any risks. To get the oil control valve (solenoid) out, it's a 24mm socket and REVERSE thread. You'll need to counter hold the back of the camshaft with a T60. There's a cam plug you remove at the back of the camshaft that will give you access to the T60 bolt. You're not loosening the rear of the camshaft - just counter hold. I had this code for an entire year and glad it's finally done. If cleaning it doesn't solve the issue then perhaps you need a new oil control valve. They're not too expensive, and since they're an internal engine part, I'd buy at the dealer or genuine online such as fcp euro or something.

So here's some background:
Like everyone else, I started getting this code and when I would turn off the check engine light with my basic scanner, I could drive as many miles as I wanted but once I re-started the car, code p0019 would reappear. Drove me crazy, too. My car has 140,000 miles and I had already changed all the magnets at 120,000 so it wasn't that. i also knew it wasn't the camshaft position sensors since I swapped one and the code didn't change. And to be honest, I didn't bother changing the CRANKshaft position sensor either since it wouldn't make sense that I was only getting a code for 1 of the 4 camshafts. Also, I didn't do the whole 305 degrees of engine rotation and look through the holes. Because if I had a MORE SERIOUS timing problem, I know these cars, the car wouldn't allow me to drive for 100 miles or more without the CEL coming on (again, could drive as long as I wanted once I cleared the code but when I'd restart, I'd get p0019.

Best of luck - and by the way, I still have no idea why you can drive all you want once you re-set the code and then it reappears when you re-start the engine, but I'm not a mechanic or engineer and frankly, while it would be interesting to know why, I guess I don't care. When i used to reset the code the car ran fine, but once you genuinely FIX the problem, your C or E class will feel like NEW again...I promise it's not a placebo. I have throttle response at any RPM now. The car ran fine when i cleared out the code, but it didn't run the way it's supposed to...that I can tell you.

Al

ml350992

I have an ml 350 with the same code, I'm going to try what you did because like you said, if it was serious like that, more issues would have arisen. The same code and check engine light has been on for a year now.

Al Golzari

Good luck. I don't know what year your car is but assuming it's not part of the balance shaft problem, then what I did should hopefully help you. It's been about two months now and still going strong. So what I did seemed to work and wasn't temporary or a lucky fluke.

juanmor40

Just be careful you may not have the same engine. The 2010 C300 carries an M272 engine, while your 2013 ML350 carries an M276 engine. Totally different animals even being MB engines. You can check your datacard using your VIN number ( https://www.lastvin.com/) and see the engine model number

Al Golzari

I agree. I thought the ML350 had the M272 engine. If it's a different engine, I agree with this person's post (sorry it blocks the user when this pop up comes up so I can make a comment).

juanmor40

If I understood your description, you referred to the "crankcase breather valve"/PCV valve/oil centrifuge..

Al Golzari

I am incredibly confused. This thread was about the persistent P0019 and I solved that issue and shared my solve about 2 months ago, in the event it also helps anyone. The YouTube video that you pulled up has to do with the PCV/crankcase breather valve which is at the back of the M272 engine, which I also changed and made a comment on FCP's video - but a totally different issue. That doesn't have anything to do with this thread about the P0019 which is an oil control valve and part of the variable valve system.

juanmor40

Ok.. I stand corrected since I misunderstood your description altogether.. You are referring to this valve, correct?

https://www.fcpeuro.com/products/mer...mer-2720500478

which is an interesting observation. By cleaning the control valve, you may have restored the correct oil pressure to the camshaft adjusters; therefore, they are working within specifications and keeping the computer happy. You have also saved quit a chunk of money by doing so early. If the camshaft adjusters wears out early, it will cost a good chunk of $$$

ml350992

mine is 2013 ml350. Everybody keep saying its the camshaft or the sensors or solenoids, or timing chain. Camshafts were replaced, sensors were checked and they seem fine. I will have valve checked out . Only thing thing showing in the car is the check engine light and every time is scanned its the same scan. Occasionally the car is slow to accelerate, thats it. If the valve is fine, then I will look into the timing chain.

v. kolev

Please advise, are you checked / renewed this oil regulating valve into Camshaft adjuster?

Al Golzari

Maybe you won't like this reply but trying to help you. You had the actual camshafts replaced? Or the camshaft magnets? And you say the sensors were "checked" and they "seem" fine? Don't know how you came to those conclusions. Seems that the diagnosis that either you or someone else made is too casual and not careful/serious enough. If it's the oil control valve, then as I mentioned in a post above, you need to either clean it and if that doesn't work, replace it. Maybe it's not the chain. Maybe it's the camshaft adjustor. Only thing showing in the car is the check engine light? What else would it show other than a check engine light? Maybe you can try a high quality, aggressive engine flush like BG109 and then an oil change. And see if that helps.

Al Golzari

Maybe you won't like this reply but trying to help you. You had the actual camshafts replaced? Or the camshaft magnets? And you say the sensors were "checked" and they "seem" fine? Don't know how you came to those conclusions. Seems that the diagnosis that either you or someone else made is too casual and not careful/serious enough. If it's the oil control valve, then as I mentioned in a post above, you need to either clean it and if that doesn't work, replace it. Maybe it's not the chain. Maybe it's the camshaft adjustor. Only thing showing in the car is the check engine light? What else would it show other than a check engine light? Maybe you can try a high quality, aggressive engine flush like BG109 and then an oil change. And see if that helps.

Al Golzari

Maybe you won't like this reply but trying to help you. You had the actual camshafts replaced? Or the camshaft magnets? And you say the sensors were "checked" and they "seem" fine? Don't know how you came to those conclusions. Seems that the diagnosis that either you or someone else made is too casual and not careful/serious enough. If it's the oil control valve, then as I mentioned in a post above, you need to either clean it and if that doesn't work, replace it. Maybe it's not the chain. Maybe it's the camshaft adjustor. Only thing showing in the car is the check engine light? What else would it show other than a check engine light? Maybe you can try a high quality, aggressive engine flush like BG109 and then an oil change. And see if that helps.

Johnjacob