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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 589 (ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM L3 WITH TC])DTC P2177NOTES
2008 Mazda 6 s Sport, 4D Hatchback, Standard

DTC P2177: Notes

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Notes
WARNING: This page is about a different car, the 2007 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC P2177 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2177 Fuel system too lean at off idle
DETECTION CONDITION 
  • PCM monitors the short term fuel trim (SHRTFT) and long term fuel trim (LONGFT) during closed loop fuel control at off-idle. If the LONGFT and the sum total of these fuel trims exceed the preprogrammed criteria, the PCM determines that the fuel system is too lean at off-idle.

Diagnostic support note 
  • This is a continuous monitor. (Fuel system)
  • MIL illuminates if the PCM detects the above malfunctioning condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
  • PENDING CODE is available if the PCM detects the above malfunction conditions during the first drive cycle.
  • FREEZE FRAME DATA is available.
  • DTCs are stored in the PCM memory.
POSSIBLE CAUSE 
  • Misfire
  • Front HO2S deterioration
  • Front HO2S heater malfunction
  • MAF sensor malfunction
  • Pressure regulator malfunction
  • Fuel pressure sensor malfunction
  • Relief valve (built-in fuel delivery pipe) malfunction
  • Spill valve control solenoid valve (built-in high pressure fuel pump) malfunction
  • High pressure fuel pump malfunction
  • Fuel pump malfunction
  • Fuel filter clogged or restricted
  • Fuel leakage on fuel line
  • Exhaust system leakage
  • Purge solenoid valve improper operation
  • Purge solenoid valve malfunction (stuck open)
  • Purge solenoid hoses improper connection
  • Air suction in intake-air system
  • Insufficient engine compression
  • Variable valve timing control system improper operation
  • PCM malfunction
RENDER: 1.0x

NO RELATED

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