F 150 Super Crew 4WD V8-5.4L Prop SOHC VIN Z (2003)
P1835 - P1839: Testing and Inspection
Manual Shift on the Fly (MSOF)
For diagnosis of code P1838 refer to chart
Part 3 Of 4
If there is no link in the chart then:
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This code is not a valid code for this vehicle
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Or information published by the manufacturer for this vehicle did not include this code