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P1639 Diagnostic Trouble Code Discussion for March 2008

5-Volt Reference 'B' Circuit Malfunction


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Trouble Ticket Help Requests for DTC P1639
Help Request Posted
2003 Land Rover Freelander S 2.5L MIL Lamp on, no throttle response VIN: SALNM22203
P1639: Throttle position adaptation. The Intake manifiold assy with motors was replaced due to rattle of VIS intake flap. I noticed that the fuel system adaptation was uneven from b1 to b2. The Autologic scan tool had a message that the "reset adaptations" function should only be performe...
March 20, 2008
2003 Land Rover Freelander S 2.5L MIL Lamp on, no throttle response VIN: SALNM22203
P1639: Throttle position adaptation. The Intake manifiold assy with motors was replaced due to rattle of VIS intake flap. I noticed that the fuel system adaptation was uneven from b1 to b2. The Autologic scan tool had a message that the "reset adaptations" function should only be performe...
March 20, 2008