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Home › Pontiac › 2009 › G5 Base, Automatic › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 2.2L - DTC P0351 To DTC P2544 › DTC P0420 › Repair Procedures

Repair Procedures

NOTE: A new converter with less than 100 miles on it may set DTC P0420 due to out-gassing of the internal matting. Operating the vehicle at highway speeds for approximately 1 hour may correct the condition.
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