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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 690 (ON-BOARD DIAGNOSTIC (ENGINE CONTROL SYSTEM L3) (5 OF 5))DTC P2188NOTES
2008 Mazda 6 s Sport, 4D Hatchback, Standard

DTC P2188: 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 P2188 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2188 Fuel system too rich at idle
DETECTION CONDITION 
  • PCM monitors short term fuel trim (SHRTFT), long term fuel trim (LONGFT) during closed loop fuel control at idle. If the LONGFT and the sum total of these fuel trims exceed preprogrammed criteria. PCM determines that fuel system is too rich at idle.

Diagnostic support note 
  • This is a continuous monitor. (Fuel system)
  • MIL illuminates if PCM detects above malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for the same malfunction has been stored in PCM.
  • PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.
  • FREEZE FRAME DATA is available.
  • DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Misfire
  • Front HO2S deterioration
  • Front HO2S heater malfunction
  • MAF sensor malfunction
  • Pressure regulator (built-in fuel injection pump) malfunction
  • Fuel pump malfunction
  • EGR valve stuck open
  • VTCS improper operation
  • Purge solenoid valve improper operation
  • Purge solenoid valve malfunction (stuck open)
  • Purge solenoid hoses improper connection
  • PCV valve malfunction
  • Variable valve timing control system improper operation
  • PCM malfunction
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • You are missing required tools, torque specs, or safe lifting equipment.
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