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P0638 on the 2003 Mitsubishi Montero

The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.

Nobody has written a description of this code yet.

Bulletins for this model year that name P0638
03130082003-12-15. Service bulletin. DIAGNOSTIC TROUBLESHOOTING INSTRUCTIONS IN SERVICE MANUAL FOR MFI DIAGNOSTIC TROUBLE CODE (DTC) P0638 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT RANGE/PERFORMANCE PROBLEM ARE INCORRECT. THIS BULLETIN CONTAINS CORRECTED TROUBLESHOOTING INSTRUCTIONS FOR DTC P0638. *TT

1 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.