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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (AJ]DTC P2097, P2099 [AJ]NOTES
2008 Mazda 6 s Sport, 4D Hatchback, Standard

DTC P2097, P2099 [AJ]: Notes

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Notes
DTC P2097, P2099 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2097 Target A/F feedback system too rich (Right bank)
DTC P2099 Target A/F feedback system too rich (Left bank)
DETECTION CONDITION 
  • The PCM monitors the target A/F fuel trim when under the target A/F feedback control. If the fuel trim is less than specification, the PCM determines that the target A/F feedback system is too rich.

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.
  • DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Leakage exhaust gas
  • HO2S (RR, LR) malfunction
  • IAT sensor malfunction
  • ECT sensor malfunction
  • HO2S (RF, LF) malfunction
  • Excessive fuel line pressure
  • Fuel pump unit malfunction
  • Purge solenoid valve malfunction
  • Insufficient engine compression
  • PCM malfunction
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

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

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.