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2001 Nissan Sentra GXE 1.8L Excessive Emissions
Posted to Asian Driveability on 8/31/2005 3 Replies

DTC P0420, failed state emission test. This one has a bad catalyst indicated by excessive cycling of the O2 sensor B1S2. But the question I have is why isn't the MIL on? Both Modis scan tool and state machine indicate it is commanded on, but the bulb is not li...

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car Vehicle Data

2001 Nissan Sentra GXE

VIN 3N1CB51D51
Engine1.8 L / 4 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions
OccursAlways

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
Message Closed

car Vehicle Data

2001 Nissan Sentra GXE

VIN 3N1CB51D51
Engine1.8 L / 4 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsExcessive Emissions
OccursAlways

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)