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Home >> Mazda >> 2024 >> CX-90 Turbo Select >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (On-Board Diagnostic - Pcm (VIN A) (3 Of 4)) >> DTC P2096-00: Ho2S Fuel Injection Control System: Air Fuel Too Lean >> Details On DTCs

Details On DTCs

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

System malfunction location HO2S fuel injection control system: Air fuel too lean
Detection condition Determination conditions
  • Depending on the correction deviation of the A/F sensor, a condition in which the fuel feedback correction amount ([SHRT_FUEL_TRIM_HO2S_SEN]) for the HO2S is the standard value or more and the sum ([SHRT_FUEL_TRIM_HO2S_SEN+LONG_FUEL_TRIM_HO2S_SEN]) of the fuel feedback correction amount and the fuel learning correction amount is the standard value or more continues for a specified period of time.
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