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P3090 Diagnostic Trouble Code Discussion for August 2009

Lower Rail Pressure threshold value undershot

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Trouble Ticket Help Requests for DTC P3090
Help Request Posted
2008 BMW X6 xDrive35i 3.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5UXFG43538
P3090: Lower Rail Pressure threshold value undershot. ... another shop. This BMW will crank longer than normal, then when starts idles rough like a missfire and then the MIL will come on and set code P3090 in the PCM. It also has reduced power. I am only able to scan it in generic mode as both the Gennisys and Ve...
August 07, 2009