I have a 2003 chevy Silverado with codes stating p0171 p0174 90101 what does this mean

Asked by Jan 07, 2015 at 05:23 PM

Question type: Maintenance & Repair

1 Answer


The alternator may have vaguely been connected to the codes. The codes are for lean fuel mixture on bank 1 (P0171) and bank 2 (P0174). A low voltage condition due to the alternator being bad could possibly have caused this.

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