P0171 on the 2004 Hummer H2
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.
| 030604030 | 2007-06-21. Service bulletin. VARIOUS DRIVEABILITY FUNCTIONS DUE TO CLOGGED FUEL INJECTORS, MIL/SES DTC'S P0171, P0172, P0174, P0300, P1174, P1175. *KB UPDATED 08-15-07. *KB UPDATED 8/4/09. *PE |
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| 3232 | 2005-05-11. Service bulletin. 1999 - 2005 GEN II COLD ENGINE MISFIRE AT IDLE WITH POSSIBLE P0171 AND/OR P0174. *TT |
2 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.