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  #1  
Old 04-17-2019, 08:04 PM
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Scr valve test fluid weight and spray pattern

Was hoping to get some advice on the test procedure for my 2010 x5 diesel scr metering valve. Im getting a scr catalyst efficiency code and an active tank level sensor code. I hooked it up to ista and ran the metering valve spray test. The spray pattern looked great out of three holes in the injector but the fluid weight was like 5 grams vs the 25-30 it was supposed to be. I ran the test until the pressure dropped to 0 and it was done spraying.
Anything I'm missing here before I remove and replace the injector like ista tells me to? There was no crusty build up at all on the injector and the pressure was within spec during the test. The filler cap for the active tank was pretty crusty when I bought the car 3k miles ago so I was thinking maybe the PO overfilled and clogged the vent. Doesnt look to hard to remove the tank or at least remove the fenderwell to have a peek. CEL light comes and goes. It has the old version of the NOx sensors that ista says to replace before it will check the scr catalyst and its under 120k miles so I was thinking about bringing it to the dealer to at least replace those for free first but figured Id do my best to troubleshoot first. Still getting used to doing what a computer tells me. ista sure makes troubleshooting easier vs the old fasion way Im use to.
Any suggestions? Thanks in advance.

Last edited by Ajnorris; 04-17-2019 at 09:43 PM.
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  #2  
Old 04-18-2019, 09:45 AM
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Those parts are covered under an extended warranty to 120k miles or ten years. I would approach the dealer first to discuss. My service advisor just replaced everything at 118k miles when the active tank level detectors failed.
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  #3  
Old 04-19-2019, 11:59 PM
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Talked to the dealer today and they want me to charge me to diagnose it. I might just bring my laptop in. I did notice the coolant temp is occasionally running a little low so I might do the thermostat first. I did the secret menu thing and it was running anywhere from 68c to maybe 87c in traffic. Is the lower end of that considered a little low? Ill monitor on the freeway.
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Old 04-20-2019, 01:43 AM
ard ard is offline
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Quote:
Originally Posted by Ajnorris View Post
Talked to the dealer today and they want me to charge me to diagnose it. I might just bring my laptop in. I did notice the coolant temp is occasionally running a little low so I might do the thermostat first. I did the secret menu thing and it was running anywhere from 68c to maybe 87c in traffic. Is the lower end of that considered a little low? Ill monitor on the freeway.



If you bring it in, make sure you have them write on the document "provide copes of test plans and results" in your description of the complaint. The SA will probably try to not write it down, but insist. If you must, vebrally say "oh, just humor me- if BMW wont, thats ok".



The problem can be that some BMW dealers will give you a shopping list of part$$$$. with only some under warranty.






GL




(Ive always wondered about warranties for a part that one might hand to them over the counter- most warranties do not state that "the part must be in the car and we must be able to use the whole car to troubleshot the error"...)
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Old 04-20-2019, 05:18 PM
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I've used the parts warranty a few times. One was for a part that they installed. No problem. The second was for a part I purchased. Brought it back and they replaced it no problem. The third and last time was recently when the glow plug I installed failed. I didn't want to mess with it again so I took the whole vehicle in. They diagnosed it and charged me $54. I do believe that my dealer and/or service advisor are an exception and I got the feeling that last one was a gift. I've spent enough money there lately.
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Old 04-20-2019, 05:28 PM
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OP, the when I brought my vehicle in, the service advisor told me that they would diagnose it. If the problem was determined to be warranty related, there would be no diagnosis fee. As ard recommended, I asked for the results of the test plans performed provided. I'd push hard for both concessions.

The hardest time I have with the dealer is they don't provide a parts or labor breakdown on the invoice. I've tried amd tried to get it broken down to no avail. It's just line items: "Performed test plan xxx, replaced parts yyy, checked zzz function after replacement: $450.00", etc.
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  #7  
Old 04-20-2019, 06:25 PM
ard ard is offline
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Quote:
Originally Posted by josiahg52 View Post
OP, the when I brought my vehicle in, the service advisor told me that they would diagnose it. If the problem was determined to be warranty related, there would be no diagnosis fee. As ard recommended, I asked for the results of the test plans performed provided. I'd push hard for both concessions.

The hardest time I have with the dealer is they don't provide a parts or labor breakdown on the invoice. I've tried amd tried to get it broken down to no avail. It's just line items: "Performed test plan xxx, replaced parts yyy, checked zzz function after replacement: $450.00", etc.

When you drop off the car, make sure you list what you want. That way, if they fail to provide it, legally, they have not completed the work as mutually agreed upon. When they give you a work order and you sign it, this is a two party binding contract as to what they have agred to do and what you paid. The real trick is putting what you want into the doc in a way that doesnt fully alert them at the time...some will, some wont
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Old 04-28-2019, 11:39 PM
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Yeah, all I really want is new NOX sensors and the active tank since ISTA wont even run the diagnosis test with the old sensors (says they are the old version). Just changed the t-stat and it stays right at 88-92 now. Hopefully the CEL light comes back on in the next week or so like usual.
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Old 05-11-2019, 02:34 PM
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The dealer ended up replacing the NOX sensors for free and told me I have a bad SCR catalyst (and a quote for over $2k to replace.) The paperwork said they ran the urea dosing check but I have my doubts they actually did. Anyway I found a used low mileage scr catalyst on ebay for $150 so I figure that plus a new dosing injector + cleaning everything with warm water is an order of magnitude cheaper than letting the dealer throw parts at the car. I'll post an update on the weight of the solution dispensed once I change the dosing unit and clean everything.
Couldnt get them to change the active tank since the code wasnt currently active when I brought it in.. guess Ill just wait a week or two. At least I got a free car wash.
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Old 05-11-2019, 02:37 PM
ard ard is offline
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Quote:
Originally Posted by Ajnorris View Post
The dealer ended up replacing the NOX sensors for free and told me I have a bad SCR catalyst (and a quote for over $2k to replace.) The paperwork said they ran the urea dosing check but I have my doubts they actually did. Anyway I found a used low mileage scr catalyst on ebay for $150 so I figure that plus a new dosing injector + cleaning everything with warm water is an order of magnitude cheaper than letting the dealer throw parts at the car. I'll post an update on the weight of the solution dispensed once I change the dosing unit and clean everything.
Couldnt get them to change the active tank since the code wasnt currently active when I brought it in.. guess Ill just wait a week or two. At least I got a free car wash. I brought in screenshots.

lol


You can sell your old SCR cat on ebay as a 'low mileage' unit and get over $150 for it.




See what I did there?
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