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P1811 Diagnostic Trouble Code Discussion for December 2005

Maximum Adaptive And Long Term Shift

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Trouble Ticket Help Requests for DTC P1811
Help Request Posted
2003 Buick Rendezvous CX 3.4L MIL Lamp on, radio locks, VIN: 3G5DA03E62
P1811: Maximum Adaptive/Long Term Shift. Customer had the battery change, and then started to act up --- when starting the vehicle the Driver's message center at instrument panel reads"service engine soon"Not the MIL, the radio screen reads LOCKED,while engine running, and when we turn the ca...
December 14, 2005