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1998 Dodge Durango 5.2L MIL Lamp on
Posted to Chrysler Driveability on 3/20/2002 7 Replies

Hello techs

This Durango has a new CAT and new upstream and downstream O2 sensors yet the PO420 code returns again and again. Both O2's are Mopar as well as the O.E. cat. What is the next step? There are no running problems and scan data shows both O2's at ju...

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  Related Documents & Media  1998 Dodge Durango

 
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car Vehicle Data

1998 Dodge Durango

VIN 134HS28Z3W
Engine5.2 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
Message Closed

car Vehicle Data

1998 Dodge Durango

VIN 134HS28Z3W
Engine5.2 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)