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| Transmission codes P401 & P299 http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=77654 |
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| Author: | Srytrucker [ Sat Dec 07, 2013 1:28 am ] |
| Post subject: | Transmission codes P401 & P299 |
Hi guys it went to -5 C or 27 F and I got a CEL on my jeep when I read the codes I got these two codes namely P401 & P299 relating to trans. Any ideas what caused this and possible fixes, thanks. |
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| Author: | papaindigo [ Sat Dec 07, 2013 8:04 am ] |
| Post subject: | Re: Transmission codes P401 & P299 |
Neither of those are transmission codes; in fact a normal non-dealer type scanner cannot pull any transmission codes except the generic P0700 which only tells you that the TCM has stored codes. In fact there is a TSB related to that code TSB 25-001-05 although it calls for what dealers love to do which is replace the EGR when in fact the EGR can be cleaned see viewtopic.php?f=5&t=59352&p=659410#p659410 or viewtopic.php?f=5&t=62495 P0401-EGR SOLENOID CIRCUIT NEGATIVE DEVIATION P0299-BOOST PRESSURE SENSOR POSITIVE DEVIATION P0299 can be a clogged air filter, clogged vacuum tower filter (little filter hanging off the passenger side) or a bad boost pressure solenoid (see viewtopic.php?f=5&t=70602&p=757348&hilit=boost+solenoid#p757348) or a collapsed vacuum line see viewtopic.php?f=5&t=61240 However your best bet may be to call or email Keith at GDE and get a GDE tune. |
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| Author: | Srytrucker [ Sat Dec 07, 2013 12:20 pm ] |
| Post subject: | Re: Transmission codes P401 & P299 |
Thx for the insight into this I was putting off GDE tune now it has put spotlight back on it. |
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