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2004 Mitsubishi Lancer Check Engine Light due to code P0171

The Check Engine Light may illuminate with a stored code P0171 . Our technicians tell us this can be a result of an engine vacuum leak at one or more of the fuel injector insulators. Improved insulators are available to correct this concern.

Affected Model Years

This issue affects Mitsubishi Lancer model years 2002, 2004, 2005, 2006, .

7 people reported this problem

  • 2004 94,000 Miles
    P0171 replaced MAF, CKECKED FUEL SYSTEM, RESET ECU, STARTS but will not RUN
  • 2004 96,500 Miles
    i am also having the p0171 system lean bank 1 code as well, i plug my diag. reader in clear the code and will either come back 3 days later or in ten min, i could not find a resolution so i am posting here

Mitsubishi Lancer 2004 Common Problems