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2002 Chevrolet Silverado 1500 4.3L MIL Lamp on
Posted to GM Driveability on 7/22/2005 22 Replies

hi guys thanks ahead of time, what i have is code po420 comes on after truck is driven ten miles evert time, started after it came in with hard start when wet, so we tune it up with new wires, cap, rotor, coil, check all four 02 sensor they are switching good,...

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  Related Documents & Media  2002 Chevrolet Silverado 1500

 
Message Closed w/FIX

car Vehicle Data

2002 Chevrolet Silverado 1500

VIN 1GCEC14W62
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAfter 10 Miles

Trouble Codes

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

car Vehicle Data

2002 Chevrolet Silverado 1500

VIN 1GCEC14W62
Engine4.3 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAfter 10 Miles

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)