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Pontiac
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2007
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Solstice Base, Automatic
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Repair and Diagnosis
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Engine Performance
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System
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Engine Controls & Fuel - 2.4L - DTC P0420 To P2544
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DTC P0420
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Repair Procedures
Repair Procedures
IMPORTANT:
A new converter with less than 100 miles on it may set P0420 due to out-gassing of the internal matting. Operating the vehicle at highway speeds for approximately 1 hour may correct the condition.
Catalytic Converter Replacement (LNF)
or
Catalytic Converter Replacement (LE5)
Heated Oxygen Sensor 2 Replacement
Exhaust Leakage
Restricted Exhaust