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| spurious/repetitive error P00299, Low Boost http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=60839 |
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| Author: | naturist [ Sun May 22, 2011 9:14 pm ] |
| Post subject: | spurious/repetitive error P00299, Low Boost |
In post viewtopic.php?f=5&t=60438 I detailed having an issue that required a tow. When the dealer called to tell me the damage and cost of a fix, the first thing they said was not to worry, the turbo was fine . . . . Since then, I've been seeing frequent check engine lights and error P00299 again, although this time around, the Jeep runs on without missing a beat. Just got done towing my travel trailer through the mountains, and it performed flawlessly, except for throwing that error code and setting the CEL twice. Each time it did that, I erased the error code and motored on. The first time was under tow, the second on a run into town sans trailer. Tow back was uneventful. I had the air hose from the turbo to the intercooler split last fall, so I replaced all those hoses then. But I will look around for another air leak. Any suggestions what else to look for? |
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| Author: | geordi [ Sun May 22, 2011 9:39 pm ] |
| Post subject: | Re: spurious/repetitive error P00299, Low Boost |
Check the rubber boots on that thin vacuum line that feeds the turbo's VNT vacuum motor, from the vacuum modulator on the passenger wheel well. I've had 2 of those rubber boots crack and split on me, always on the bottom where it can't be seen. If the vacuum isn't there (or weak) the turbo defaults to fully-open vanes, dumping all boost and exhaust pressure. |
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