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Dodge and Ram
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2023
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Durango R/T Plus, RWD
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Repair and Diagnosis
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Engine Performance
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System
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5.7L - DTCS P032F To P050B
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DTC Troubleshooting
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P0430-Catalyst System Efficiency Below Threshold Bank 2
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Set Condition
Set Condition
If the ratio between the Downstream O2 Sensor and the Upstream O2 Sensor signals is more than approximately 0.6/1 (or 60%), the catalyst is determined to be failing.