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1999 Chevrolet C2500 5.7L Poor Idle Quality, Misfire, MIL Lamp on
Posted to GM Driveability on 11/5/2003 9 Replies

Bank 2 is running very lean the computer thinks. It has the short term at 50% and long term at 25% and O2 still reads 460 mV. Bank 1 is fine. The O2 was caked so I put in another Delco and same problem. Any help would be great, thanks, Bob.

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  Related Documents & Media  1999 Chevrolet C2500

 
Message Closed w/FIX

car Vehicle Data

1999 Chevrolet C2500

VIN 1GCGC29ROX
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursAlways

Trouble Codes

P0151Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage
P0174Fuel System Too Lean (Bank 2)
P1153Heated Oxygen Sensor (Bank 2 Sensor 1) Insufficient Switching
Message Closed w/FIX

car Vehicle Data

1999 Chevrolet C2500

VIN 1GCGC29ROX
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFI / SEFI
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Misfire, MIL Lamp On
OccursAlways

Trouble Codes

P0151Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage
P0174Fuel System Too Lean (Bank 2)
P1153Heated Oxygen Sensor (Bank 2 Sensor 1) Insufficient Switching