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Sentra S
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Engine Performance
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Engine Control System (DTC/Circuit Diagnosis) (2 Of 4)
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DTC/Circuit Diagnosis
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DTC P0420: Three Way Catalyst Function
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DTC Description
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Possible Cause
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Possible Cause
Three way catalyst (manifold)
Exhaust tube
Intake air leaks
Exhaust air leaks
Fuel injector
Fuel injector leaks
Spark plug
Improper ignition timing