1999 E300TD sending P0200 code constantly
 

Hey everyone. Working on my 1999 E300TD with the OM606 Turbo. Some background on the car, purchased recently with 270K miles. Since purchasing I have changed the oil/oil filter, changed radiator, and most recently pulled all injectors and pop tested. Two of the six injector nozzles are bad (I ordered new nozzles but they will take a month to get to me). The car runs great other than misfires while cold or if sitting in traffic a while at idle (I suspect this is due to the bad injectors)


I have been getting the P0200 code every 4 to 3 weeks and can not figure out what is causing it. More recently it started happening every 5 to 10 minutes of driving. The check engine light comes on and the engine is killed immediately making the car undriveable at this point. unfortunately I only have a standard OBD II reader so I dont know exactly what the P0200 code is. Everything Ive seen says you essentially can not buy the code reader for this car.



Could the two bad injector nozzles be throwing the code? From what I understood, Since they are mechanical injectors they aren't able to throw codes to the ECM. But I could be mistaken.

If its not the bad nozzles sending the code what else should I check for? Im not sure how I could check the ECM or IP but I could pick some up at a junkyard and replace. I would rather be certain I am replacing the right part though instead of blindly replacing parts and praying. Is there any other way to diagnose this car without the proper code reader? Can you purchase a code reader for under $300 for this car?


Thanks in advance for any insight into this issue.

UPDATE: I called my local indy Mercedes shop and they told me it would be $50 to read the check engine codes. I'm thinking I should do it. The only reason I am slightly hesitant to spend that money is if a bad injector nozzle can throw this code then it would be telling me something I already know.

Any one with an E300TD know if a bad injector nozzle is able to throw a P0200 code? or really any code for that matter

Thanks for any insight on this

No it shouldn't. That is the first I've heard of a check engine light coming on shuts the engine down. Get somebody that can hook up under the hood to tell you what the code is.

Ok thanks for the input, then I will go ahead and have someone with the proper computer read the code for me. I will follow up with the results


From my research I am not the only one that has experienced the engine shutting down when the P0200 code is sent. when the P0200 code triggers I believe the ECM stops sending voltage to the IP. Again I am very new to this car and system so I could be mistaken with this information. Still trying to learn more about the EDC Injection pump.

You want them to connect to the 38 pin connector on drivers side fuse box under hood.

One thing, that will kill this engine dead, is the crank angle sensor failing. Lived it first hand.

See http://www.peachparts.com/shopforum/3826850-post20.html this is the single post (#20) with the part number of the sensor.

Entire thread, I went through quite a bit getting the issues sorted: http://www.peachparts.com/shopforum/diesel-discussion/393787-w210-can-bus-issues-2.html

P0200 in the OBDII “standard” is injector system malfunction. Well this vehicle has a mechanical injection pump with a drive by wire actuator. It does not have electronically controlled injectors like later engines.

I would go to the MB dealer parts counter and order one of the sensors. It is fairly easy to change if you have the right tools. It’s directly below the oil filter on the end of the engine block (it senses the flywheel teeth).

This may well solve your problem.

Fuel quantity actuator at rear of pump.
The actuator is a solenoid that moves the injector fuel pump rod back and forth as you accelerate and or slow down---allows more or less fuel to be injected into the cylinders.

Failure mode of crank sensor is typically engine starts and runs fine until it gets up to temp then it shuts down. After engine cool it starts and runs fine again. I have gotten to where I replace them as a preventive maintenance items about every 200k miles.

The p/n for crank sensor on 98/99 E300 is 203 153 74 28 64.

Thank you so much everyone!

I am hoping when I find what the actual code is it will narrow down my search a lot.

I should have time to get the codes read tomorrow and will follow up with my findings.

Everyones input is making me feel a lot better as I was initially thinking this would entail swapping my complete IP or even worse the ECM. It is very good to know I can remove just the electrical components from the IP if needed. Replacing the crank sensor looks fairly simple as well once the intake manifold is removed.

Not true at all. There are a number of 3rd party code readers that will work with this car. As has been mentioned, you want one that can plug into the round 38 pin connector under the hood. This sounds like it may be a good investment for you. FYI The ones that can only do standard OBD2 are useless on this car, so don't buy one of those.

I was able to do it without pulling the manifold by using a couple of 12" extensions and a u-joint adaptor. It does help to be tall, my arm was long enough to reach down there and pull it out.

Forum member TimFreeh reports that an Autel MS906 works with these models through the 38 pin port. I believe him, as I sold him my W210.

http://www.peachparts.com/shopforum/diesel-discussion/409528-how-clear-dtc-codes-1999-w210-e300d.html#post4120037

The OBDII connector on the 98-99 W210 diesels only passes a select list of engine and transmission codes, just enough to satisfy the rules that were in place at that time. Everything else has to go through the 38 pin connector. With the proper tool there is quite a bit of data that can be pulled not only from the power train, but also the body controllers and the climate system.

An Autel system is the type I have.

I can confirm as I too own an MS906. The MS906 includes the 38 pin Mercedes adapter so no need to buy anything additional. The MS906 is around $1300 though so more on the spendy side, more of an enthusiast tool than something every w210 owner should have.

I also have one of Autel's smaller consumer units, I can't remember the model number but it was inexpensive at around $200. It works with the w210 but requires you to purchase separately their "intelligent 38 pin adapter" which is $150 more. Note you must use the more expensive "intelligent" adapter that has a black box hanging off it. Their lower-end diagnostic tools won't work on w210 with a passive adapter.

It's only generic emissions related codes via OBD2 on the w210. No transmission, no ABS, no airbags, nothing else. Emissions-related engine faults only. And generic codes only; nothing that is Mercedes-specific or Diesel-specific. Ergo, the OBD2-only diagnostic tools are pretty much useless on these cars.

Yes I can not justify spending $1300 on the diagnostic tool when the whole reason I purchased this car was to swap the engine in one of my W123s. That will probably be in a few years though and I was using this as my daily driver until this issue.

Has anyone messed around with getting an older laptop that runs windows 10 and purchasing the diagnostic software for it? I see you can purchase some bootleg versions of mercedes diagnostic software fairly reasonable on ebay. This would be the cheapest route I have found if it even works as I would just need the software and an adapter cord. Has anyone tried this on an older W210? I feel like it would work fine on newer models but I'm not so confident it would work for my 1999, again I don't really know much about this so please excuse my ignorance.


Also tried to get my codes read today, shop owner told me they would have time but I called before bringing it in today and the owner wasnt there and nobody else knew anything about it so they said they couldnt fit me in :mad:

I guess that's all the more reason to either purchase the software or one of Autel's smaller consumer units


Working on this car really makes me appreciate my older pre computer mercedes diesels haha