P0174 on the 2004 Mercury Mountaineer
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.
| 18719 | 2005-12-06. Service bulletin. MALFUNCTION INDICATOR LAMP COMING ON WITH DIAGNOSTIC TROUBLE CODES (DTCS) P0171, P0172, P0174 AND/OR P0175 (FUEL SYSTEM TOO RICH OR LEAN). *TT |
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| 0539 | 2005-04-05. Service bulletin. MIL ON AND/ OR RUNS ROUGH/MISFIRE DTCS P0300-P0308 P0316 AND OR P0171/P0174 4.6L ENGINE. *EH |
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.