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1999 Chevrolet C3500 7.4L Excessive Emissions
Posted to GM Driveability on 12/13/2005 10 Replies

Thanks in advance for any help. This truck came in for a smog inspection. Failed as a gross polluter for hc at idle. Engine runs good, no misfires. Could not find anything that jumped out at me. At idle the short term fuel trim is right around 0 both banks, go...

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  Related Documents & Media  1999 Chevrolet C3500

 
Message Closed w/Summary

car Vehicle Data

1999 Chevrolet C3500

VIN 1GCDC5TTTV
Engine7.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / pfi
EmissionsOBD-II Compliant
SymptomsExcessive Emissions
OccursIdle

Trouble Codes

P0125Engine Coolant Temperature Sensor Slow Response
P0175Fuel System Too Lean (Bank 2)
P0338Crankshaft Position Sensor Voltage Too High
P1153Heated Oxygen Sensor (Bank 2 Sensor 1) Insufficient Switching
Message Closed w/Summary

car Vehicle Data

1999 Chevrolet C3500

VIN 1GCDC5TTTV
Engine7.4 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / pfi
EmissionsOBD-II Compliant
SymptomsExcessive Emissions
OccursIdle

Trouble Codes

P0125Engine Coolant Temperature Sensor Slow Response
P0175Fuel System Too Lean (Bank 2)
P0338Crankshaft Position Sensor Voltage Too High
P1153Heated Oxygen Sensor (Bank 2 Sensor 1) Insufficient Switching