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Home >> Mazda >> 2024 >> CX-90 Turbo Select >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> On-Board Diagnostic - Pcm (VIN C & VIN D) (4 Of 5) >> DTC P2096-00: Ho2S Fuel Injection Control System: Air Fuel Too Lean >> Details On DTCs

Details On DTCs

P2096: 00 (PCM (H3T)) DETECTION CONDITION AND POSSIBLE CAUSE

System malfunction location HO2S fuel injection control system: Air fuel too lean
Detection condition Determination conditions
  • Due to a correction deviation of the A/F sensor, the specified period of time has elapsed while the fuel feedback correction amount [SHRTFT12] for the HO2S is the standard or more and the fuel learning correction amount ([SHRTFT12] + [LONGFT12]) is the standard or more.
Preconditions
  • HO2S estimated temperature: Above 450°C {842°F}
Malfunction determination period
  • 25 s period
Drive cycle
  • 2
Self test type
  • CMDTC self test
Sensor used
  • HO2S
Fail-safe
  • Not applicable
Vehicle status when DTCs are output
  • Not applicable
Possible cause
  • Erratic signal to PCM
    • ECT sensor signal malfunction
    • MAF sensor signal malfunction
    • MAP sensor signal malfunction
    • IAT sensor No. 2 signal malfunction
    • Related connector or terminals malfunction
    • Related wiring harness malfunction
  • Improper operation of electric variable valve timing control system
    • Electric variable valve timing driver malfunction
    • Electric variable valve timing motor malfunction
    • Electric variable valve timing actuator malfunction
  • Improper operation of hydraulic variable valve timing control system
  • Air suction in intake air system
  • Poor fuel quality
  • HO2S malfunction
    • HO2S incorrect installation
  • A/F sensor malfunction
    • A/F sensor incorrect installation
    • Exhaust system leakage
    • A/F sensor deterioration
  • Fuel injector malfunction
    • Improper operation of fuel injector
    • Fuel injector related wiring harness malfunction
  • Improper operation of purge control system
    • Purge solenoid valve malfunction
    • Purge solenoid hoses improper connection
  • Fuel leakage or restriction in fuel line
  • MAP sensor malfunction
  • MAF sensor malfunction
  • Air cleaner element restricted
  • PCM malfunction