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Old 06-24-2014, 02:44 AM   #1
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Error Code 299-Loss of Power

Has anyone ever experienced a sudden loss of power issue with their Airstream Interstate? I have an 2011 AI with about 23,000 miles. A few weeks ago, while driving my AI to work, I experienced a sudden loss of power. Even when I steped on the accelerator pedal all the way, the AI could not accelerator past 40 mph. Then, the Engine Diagnostic Indicator came on. Based on what I read in the Sprinter's Manual, it appeared that the Sprinter has entered into the Limp Home Mode (LHM) so it could not accelerate over 40 mph. I continued to drive the AI to work and then I took the AI to an auto shop near my company. The owner was very nice and tried to find out the issue for me. He connected a diagnostic scan tool to a port under the steering wheel and got an error code of 299. He reset the error code and the Engine Diagnostic Indicator disappeared and the AI drove normal again. This was apparently a Mercedes-Benz Sprinter issue, so I took the Sprinter to the local Meredes-Benz dealer. However, they said that since the error code has been reset, they could not do anything. The Service Manager suggested me to bring the Sprinter back when the problem re-appeared. It has been about 5 weeks since I enountered that issue, but the problem did not re-appear. I am planning to take my family on a long road trip and is kind uncomfortable with this issue. I would greatly appreciate if anyone can provide their inputs on this. Thank you very much!
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Old 06-24-2014, 05:14 AM   #2
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As a rule, when any idiot light (such as "Check Engine") comes on it's a good idea to cycle through the dashboard text displays until you get to "Messages." This will (sometimes) give you more information on what is going wrong.

In general, Emergency Mode (Limp Home Mode) is usually activated by a problem with the fuel system or the injectors. This includes extremely low fuel, just before you run out completely.
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Old 06-24-2014, 07:44 AM   #3
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Error Code 299-Loss of Power

LHM can be triggered by many things, not just fuel or injector issues. In my case, my 2010 Interstate went into LHM due to a small split in one of the hoses connected to the turbo intercooler. In my experience, it is likely that your issue will return eventually. When it does, visit a Sprinter authorized MB or Freightliner dealer. Very few independent shops have scanners that can correctly read all the codes and sub-codes generated by a Sprinter ECM.

You can find Sprinter authorized dealers at www.mbsprinterusa.com or www.freightlinersprinterusa.com


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Old 06-24-2014, 07:47 PM   #4
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From what I found here, sounds like you may have a split turbo hose. Check post #5 for P0299.
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Old 06-24-2014, 08:11 PM   #5
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LHM will be triggered by just about anything deemed to negatively affect emissions.

It could be a ton of things causing this.


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Old 06-25-2014, 11:16 AM   #6
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Quote:
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From what I found here, sounds like you may have a split turbo hose. Check post #5 for P0299.
Hello! 73shark. Thank you very much for providing the link with the diagnostic code information.
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Old 06-25-2014, 11:19 AM   #7
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Quote:
Originally Posted by wayneskid View Post
LHM can be triggered by many things, not just fuel or injector issues. In my case, my 2010 Interstate went into LHM due to a small split in one of the hoses connected to the turbo intercooler. In my experience, it is likely that your issue will return eventually. When it does, visit a Sprinter authorized MB or Freightliner dealer. Very few independent shops have scanners that can correctly read all the codes and sub-codes generated by a Sprinter ECM.

You can find Sprinter authorized dealers at The 2014 Sprinter Van. Ahead of its time. Again. or The 2014 Sprinter Van. Built to Work Smarter.


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Hello! Wayneskid. Thank you very much for sharing your experience on this issue. I will ask someone to inspect the hoses connected to the turbo intercooler.
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Old 06-25-2014, 11:27 AM   #8
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The turbo resonator was a common problem on older interstates. Maybe they still have a problem.. If so, buy an aluminum after mkt one and be done with the problem. Do not know if this applies to new models. Jim
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Old 06-25-2014, 09:12 PM   #9
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Old 06-26-2014, 07:15 AM   #10
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Thanks, bob for the link. That is what I meant... Jim
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Old 06-30-2014, 09:30 AM   #11
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I have just purchased the ScanGage II from upscale automotive (the sprinter store) and they can me a PDF doc of all the codes an P0299 is a Turbo Under Boost according to that list. now why you had a P0299 I dont know but if it is intermittent the I would suspect the split hose others have talked about.
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Old 07-02-2014, 02:55 PM   #12
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Smile P0299 Error Code

Quote:
Originally Posted by bennu36 View Post
I have just purchased the ScanGage II from upscale automotive (the sprinter store) and they can me a PDF doc of all the codes an P0299 is a Turbo Under Boost according to that list. now why you had a P0299 I dont know but if it is intermittent the I would suspect the split hose others have talked about.
Hello! Bennu36. Thank you very much for sharing the information. I will definitely find someone to check the split hose issue for me.
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Old 07-02-2014, 06:57 PM   #13
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I too recently had a sudden limp home mode incident on my Interstate. I have my Scanguage II working at the time which showed the MAP, manifold air pressure, at a steady 14.5. There was no codes nor did the check engine light come on. Having read threads on this common T1N problem I changed out the turbo reasonator with the aluminum replasement and went on my merry way.
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