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| CEL on code is P0069????? http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=50091 |
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| Author: | mikesully02 [ Wed Feb 10, 2010 9:41 pm ] |
| Post subject: | CEL on code is P0069????? |
I know that p0069 is BOOST KEY-ON RATIONALITY, but what does this mean? And should i worry about it? |
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| Author: | CATCRD [ Wed Feb 10, 2010 9:49 pm ] |
| Post subject: | Re: CEL on code is P0069????? |
Sounds like the sensor on the side of your air filter box is bad or disconnected. In that instant when you turn the key on the ECM checks whether the pressure readings from that sensor and the manifold sensor are within some prescribed tolerance of each other - a rationality check. |
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