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We are not only ones with dumb tsb

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Check out what GM tech's have to go thru for what looks like our p207f code. I like this tech's quote"I used to like working on diesels". I find I am starting to feel the same way about trying to fix these new diesels.

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I can disagree with just about everything he said about the value of pollution control systems.  Particualte matter rises in to the sky, then falls back to earth?  I don't care where the PM is, less is better!

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Can you agree with how dumb it is to have a tech wasting that much time driving and waiting 70 minutes to get a test result when they should just be replacing a part or reprogramming a pcm to actually fix something.

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The gm ECM programming stinks when there is a fault. After repair and clearing of certain dtc's you have to do the reductant fluid quality test and the dts must pass, or test drive and make the code pass. This is a good repair verification as well. Good thing is they have used 2 nox sensors from the beginning, and a 70 percent reduction is pretty accurate for a min. As for the tsb, if ou use logical thinking and a test drive it is pretty easy to see the reduction in the scr brick. The scan data is very good. If the reduction Is sub par, you measure the injector flow, and if it is good, drain and fill with new fluid and test drive, and if it is still low, a new scr is needed. Running the test each time is more time consuming than just flogging on the road. Also a good flogging will clear the brick like the filter regen will do stationary. As for labor, .3 diag, sometimes a regen or fluid quality test can be claimed depending on the labor op. anything over that has to be signed by the sm and is up to 2.0 hours. After about 10 software updates, the system is pretty good.

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