P0171

DIAGNOSING FUEL TRIM CODES: P0171 “BANK 1 LEAN” AND P0174 “BANK 2 LEAN” – Mitsubishi

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SUBJECT:DIAGNOSING FUEL TRIM CODES: P0171 – “BANK 1 LEAN” & P0174 – “BANK 2 LEAN” No: TT-156-13-001 DATE: January, 2009 MODEL: All (exc. Raider)   DIAGNOSING FUEL TRIM CODES: P0171 “BANK 1 LEAN” AND P0174 “BANK 2 LEAN” — All Models (exc. Raider). DTCs P0171 and P0174 result in many Techline calls, often after a … Read more

DTC P0171 “System Too Lean” – 2004-2006 Mitsubishi Lancer

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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