× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
1999 Chevrolet Express 3500 LS 5.7L Poor Fuel Economy, Low power
Posted to GM Driveability on 7/5/2012 12 Replies

Engine runs smooth with no misfire of hesitation, always starts right up. When rev'd it remains smooth but feels restricted (hence replacing the converters). Road test leaves you feeling less than satisfied as it struggles to reach speed limits in town. Codes ...

12 Replies Received (View Replies)

  Related Documents & Media  1999 Chevrolet Express 3500 LS

 
Message Closed w/FIX

car Vehicle Data

1999 Chevrolet Express 3500 LS

VIN 1GAHG39RXX
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Fuel Economy, Low Power
OccursUnder Load, on Accel, Cruise

Trouble Codes

P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage
P0137Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage
P0151Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage
P0157Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage
P0327Knock Sensor Front Circuit Low Voltage
P0463Fuel Level Sensor Circuit High Voltage
Message Closed w/FIX

car Vehicle Data

1999 Chevrolet Express 3500 LS

VIN 1GAHG39RXX
Engine5.7 L / 8 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Fuel Economy, Low Power
OccursUnder Load, on Accel, Cruise

Trouble Codes

P0131Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage
P0137Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage
P0151Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage
P0157Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage
P0327Knock Sensor Front Circuit Low Voltage
P0463Fuel Level Sensor Circuit High Voltage