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1999 Chevrolet Express 2500 5.7L Hesitation
Thanks to all fellow techs who review this and try to help me out. I have terrible luck with trying to diagnose these CSFI engines. Customer brought to our shop, it was a recent car lot purchase, with bad hesitation, back firing under slight load, checked fuel...
Summary posted 8/1/2007
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Related Documents & Media | VIN | 1GAGG25R8X |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / CSFI |
| Emissions | OBD-II Compliant |
| Symptoms | Hesitation |
| Occurs | Under Load |
Trouble Codes
| P0101 | Mass Airflow Sensor Range/Performance |
| P0131 | Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage |
| P0137 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage |
| P0151 | Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage |
| P0172 | Fuel System Too Rich (Bank 1) |
| P0175 | Fuel System Too Lean (Bank 2) |
Message Closed w/Summary
Vehicle Data
1999 Chevrolet Express 2500
| VIN | 1GAGG25R8X |
| Engine | 5.7 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI / CSFI |
| Emissions | OBD-II Compliant |
| Symptoms | Hesitation |
| Occurs | Under Load |
Trouble Codes
| P0101 | Mass Airflow Sensor Range/Performance |
| P0131 | Heated Oxygen Sensor (Bank 1 Sensor 1) Circuit Low Voltage |
| P0137 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage |
| P0151 | Heated Oxygen Sensor (Bank 2 Sensor 1) Circuit Low Voltage |
| P0172 | Fuel System Too Rich (Bank 1) |
| P0175 | Fuel System Too Lean (Bank 2) |
Video