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2008 Chevrolet Uplander LS 3.9L MIL Lamp on
Posted to GM Driveability on 11/8/2018 14 Replies

this vehicle is driven mainly short runs by an elderly couple. P0420 will set intermittantly if cleared. If driven on highway for a half hour or longer it will clear the code. has new plugs and wires,no evidence of coolant ingestion, and no power loss sugg...

14 Replies Received (View Replies)

  Related Documents & Media  2008 Chevrolet Uplander LS

 
Message Closed w/Summary

car Vehicle Data

2008 Chevrolet Uplander LS

VIN 1GNDU23198
Engine3.9 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIntermittently

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
Message Closed w/Summary

car Vehicle Data

2008 Chevrolet Uplander LS

VIN 1GNDU23198
Engine3.9 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursIntermittently

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)