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returning error P0299
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=83969		 Page 1 of 1
Author:  DUSIEK [ Tue Feb 02, 2016 1:27 pm ]
Post subject:  returning error P0299
I have a problem to solve a turbo underboost error. When I clear a code it still off until the engine get warmer. There is also a lot of smoke when I start cold engine. The engine runs good most of the time, but sometimes switch to limp mode. The smoke disappeared after the engine is warm. I checked already all turbo components. Everything is Ok. The turbo hoses, turbo itself, all turbo related components ( sensors and valves) seems Ok.
I have no clue what is wrong and where to look to find a faulty part.
Thanks for any help.
Author:  Jay ne Ohio [ Tue Feb 02, 2016 1:40 pm ]
Post subject:  Re: returning error P0299
Probably need a new MAP sensor (or carefully clean your old one). You can buy them from Jeep dealers for $130 or Chevy dealers for about $20: GM part # 55206797
Author:  DUSIEK [ Tue Feb 02, 2016 8:00 pm ]
Post subject:  Re: returning error P0299
Thank you. Just ordered one for $25 online.
Author:  DUSIEK [ Sat Feb 06, 2016 3:12 pm ]
Post subject:  Re: returning error P0299
A new MAP sensor installed. Still have that underboost P0299 error. When the engine is cold and ECU error clean there is no check engine light . I can drive 20,30 miles and there is no code at all.
The Jeep runs OK, no limp mode, no smoke. When I turn the engine off and start again the check engine light comes almost instantly. :banghead:
Thanks
Author:  Jay ne Ohio [ Sat Feb 13, 2016 9:55 am ]
Post subject:  Re: returning error P0299
I'm glad to hear it is running better. Personally, I would just ignore the cel unless you need it off to pass an emissions test.
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