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Old 10-03-2015, 09:45 AM   #1
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Exclamation Engine Light - DEF sensor

Hi Fellow Interstate/Sprinter Airstreamers: I am new to site and appreciate all the benefits I have received from all of you. I feel welcome and as a new owner right at home. My last few trips have been from home in NY - LongIsland to Indiana. I have had a recurring problem with engine light illuminated then 10 Starts Left message on my display. I don't know is anyone has had this issue yet but it goes further than topping off the DEF in the MB diesel engine.
1. Rolled into Gurley Leep - MB dealer in Mishawaka (South Bend) Indiana area
2. As indicated above engine light illuminated with 10 starts left.
3. Topped off DEF as it was low and reset on tech computer at MB dealer.
note: I discovered new vehicles delivered have MINIMAL DEF inside as they prep.
4. After reset drove home and after 250 miles engine light came on again and same as above happened. YES Frustrating
5. Brought into MB dealer on Long Island and reset and topped off again - nothing on tech computer showed any issue.
6. Next trip to Indiana last week and guess what? Happened again.
7. Yes, equally frustrated once again.
8. MB dealer in Indiana said this has been a significant problem with Sprinters and MB engineers in corporate have not figured out as yet.
9. Indicated they had 80% success rate in changing NOX sensors
10. Gurley Leep could not have been nicer. They troubleshooted problem and lent me a MB SUV to use while there.
11. Now back on Long Island and utilized 6 of the 10 starts allowed to get me back home.
12 MB dealer in NY changed NOX sensors and had them do an oil change just so I have my own baseline on maintenance as a new owner.
13. Picking up today and will keep all on forum updated.
Has anyone else had this issue and has there been any other updates on this??

Crossing my fingers today picking up today... JJ Streaming... I actually miss it
I promise to keep all updated.
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Old 10-03-2015, 10:10 AM   #2
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Welcome to Airforums.

The NOX sensor will hopefully fix your problem.
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Old 10-03-2015, 05:59 PM   #3
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When others have had this problem it was the sensors. Hopefully you're"fixed"
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Old 10-03-2015, 08:13 PM   #4
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Mine did the same, came on when I filled up with DEf. First message is poor quality, next was check engine. Replaced nox sensor and fixed the problem. However came back on and dealer told me to clean the air filter and as of now working. Like going to the doctor often they tell you what you don't have.
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Old 10-04-2015, 01:32 PM   #5
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Tulsa , Oklahoma
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DEF 10 Starts

I've had same problem. MB said it was wiring harness damaged by rodents. Don't know if that was all it was or not. Just getting it back from dealer.
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Old 10-05-2015, 10:35 PM   #6
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Taylor Ridge , Illinois
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Had the same issue. MB dealer replaced both NOX sensors. With about 500 miles since, so far, so good.


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Old 10-09-2015, 06:36 PM   #7
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Got Grand Tour back. Turned out chewed wires were only problem. Freightliner notes said they had to remove grill to get to chewed wires. I couldn't see wires looking behind grill. Does that sound right?

Trying ultrasound and moth balls. We'll see if that helps.
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Old 10-09-2015, 07:39 PM   #8
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Try some traps.
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Old 10-09-2015, 08:48 PM   #9
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Quote:
Originally Posted by Bobsprinter View Post
Freightliner notes said they had to remove grill to get to chewed wires. I couldn't see wires looking behind grill. Does that sound right?
Could be. Just because the wires can be reached with the grille removed doesn't necessarily mean they can be seen with the grille in place.
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Old 10-11-2015, 05:19 PM   #10
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Mothballs

Quote:
Originally Posted by Bobsprinter View Post
Got Grand Tour back. Turned out chewed wires were only problem. Freightliner notes said they had to remove grill to get to chewed wires. I couldn't see wires looking behind grill. Does that sound right?

Trying ultrasound and moth balls. We'll see if that helps.
I don't recommend mothballs (Naphthalene) but if you use them anywhere take a moment to think ahead about how you'd remove them. Perhaps placing them in a cut off (foot) section of pantyhose would allow you to retrieve and dispose of them.
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Old 10-11-2015, 11:41 PM   #11
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Dear iaqstuff, other than being able to remove them, is there a reason you don't recommend them? My concern isn't inside the sprinter as much as it is under the hood.
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Old 10-12-2015, 06:58 AM   #12
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Update on def

Got vehicle back. Mb replaced box sensors. Will be taking on road this weekend for a short trip. Heading up to Mohunk mountain -upstate ny for the day. Hopefully no engine light will illuminate. Will let you know if does.
So grateful for the community here and your responses. After reading some I hope I don't have to deal with a rodent eating my wiring. Does everyone try to prevent this in some way? I keep my interstate airstream in my driveway
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Old 10-12-2015, 07:43 AM   #13
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So grateful for the community here and your responses. After reading some I hope I don't have to deal with a rodent eating my wiring. Does everyone try to prevent this in some way? I keep my interstate airstream in my driveway
Never had a problem with rodents, outside or inside— so far. Perhaps relatively frequent use of the vehicle discourages them?
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Old 10-12-2015, 09:59 PM   #14
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Mothballs (Naphthalene)

Quote:
Originally Posted by Bobsprinter View Post
Dear iaqstuff, other than being able to remove them, is there a reason you don't recommend them? My concern isn't inside the sprinter as much as it is under the hood.
Bobsprinter: First, the reason I suggest thinking about how you'd remove them is because I believe you will want to remove them long before they volatilize off completely. I also think you'll find that as they off-gas the odor will penetrate into the interior of the coach - depending on pressure differentials caused by temperatures, winds, etc. I have experienced instances where people tossed them into attics and under homes only to later find the odor penetrated their occupancy area and the mothballs were in areas they could no longer access. Second, they are very toxic - but rather than go into the various ways they can become a personal health problem, I'll just refer you to this website - Naphthalene | Technology Transfer Network Air Toxics Web site | US EPA
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