P1650 on the 1999 Isuzu Trooper
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.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| IB0004S005 | 2001-01-28. Service bulletin. THIS BULLETIN PROVIDES INFORMATION ON THE P1640 AND P1650 OUTPUT DRIVE CODES WHICH REFER TO OUTPUT DRIVER CIRCUIT CONDITIONS RELATED TO THE PCM. *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.