DTC P0171 “System Too Lean” – 2004-2006 Mitsubishi Lancer
SUBJECT: DTC P0171 SYSTEM TOO LEAN No: TSB-06-13-009 DATE: April, 2006 MODEL: 2004-06 Lancer 2.0L PURPOSE The MIL may come on and DTC P0171 “System Too Lean” may set in the PCM. This condition may be due to vacuum leakage around a fuel injector insulator. To eliminate this condition, install a new, improved O-ring … Read more