DTC P2096-00; P2097-00; Ho2S Fuel Injection Control System Too Lean Or Too Rich: Notes
NOTE:
- To determine the malfunctioning part, proceed with the diagnostics from "Function Inspection Using M-MDS".
Details On DTCs
DETECTION CONDITION AND POSSIBLE CAUSE
| DESCRIPTION |
HO2S fuel injection control system:
- P2096:00: Air fuel too lean
- P2097:00: Air fuel too rich
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| DETECTION CONDITION |
Determination conditions |
- P2096:00: Depending on the correction deviation of the A/F sensor, a condition in which the fuel feedback correction amount (SHRTFT12) for the HO2S is the specified value (2 %) or more and the sum (SHRTFT12+LONGFT12) of the fuel feedback correction amount and the fuel learning correction amount is the specified value (2.3-2.5 %) or more continues for a period of 25 s.
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- P2097:00: Depending on the correction deviation of the A/F sensor, a condition in which the fuel feedback correction amount (SHRTFT12) for the HO2S is the specified value (-2 %) or less and the sum (SHRTFT12+LONGFT12) of the fuel feedback correction amount and the fuel learning correction amount is the specified value (-2.5- -2.3 %) or less continues for a period of 25 s.
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| Preconditions |
- HO2S estimated temperature: above 450 °C {842 °F}
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| Malfunction determination period |
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| Drive cycle |
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| Self test type |
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| Sensor used |
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| FAIL-SAFE FUNCTION |
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| VEHICLE STATUS WHEN DTCs ARE OUTPUT |
- Illuminates check engine light.
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| POSSIBLE CAUSE |
- Erratic signal to PCM
- ECT sensor No. 1 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
- A/F sensor malfunction
- A/F sensor loose
- Exhaust system leakage
- 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
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