Mike's Workshop Manuals
: Service manuals for every vehicle
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Isuzu
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2006
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i-350
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System - 3.5L (L52) - DTC P0365 To DTC P1112
>>
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.
Exhaust Manifold Replacement (LK5)
or
Exhaust Manifold Replacement (L52)
Catalytic Converter Replacement (RWD)
or
Catalytic Converter Replacement (4WD)
Heated Oxygen Sensor Replacement - Position 2
Exhaust Leakage
Restricted Exhaust