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P1638 Diagnostic Trouble Code Discussion for November 2014

TCM Internal - CAN 1 RAM Performance

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Trouble Ticket Help Requests for DTC P1638
Help Request Posted
2004 Land Rover Range Rover HSE 4.4L Poor Idle Quality, Surge, Stall VIN: SALME11434
P1638: Throttle not learned. HI Techs. we need your expertise here. Vehicle came in for oil leak repair from valve cover gaskets and engine rear main seal , engine WAS running fairly good but run like SH@#T after repair made . recheck the work , check wiring around the works , trace and c...
November 28, 2014