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2003 Chevrolet Express 3500 6.0L Misfire, MIL Lamp on
Posted to GM Driveability on 10/21/2008 8 Replies

We got this vehicle in for check engine light codes p0300 multiple cyclinder miss fire and code p0340 catalytic effiency bank 2 check cat post o2 sensor voltage varrying from 200 to 800 mv same as pre o2 sensor we are recommending cat. check code p0300 check m...

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  Related Documents & Media  2003 Chevrolet Express 3500

 
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Express 3500

VIN 1GBHG31U33
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp On
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected
P0430Catalyst Efficiency Below Threshold (Bank 2)
Message Closed w/FIX

car Vehicle Data

2003 Chevrolet Express 3500

VIN 1GBHG31U33
Engine6.0 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI
EmissionsOBD-II Compliant
SymptomsMisfire, MIL Lamp On
OccursAlways

Trouble Codes

P0300Multiple Misfire Detected
P0430Catalyst Efficiency Below Threshold (Bank 2)