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1999 Chevrolet Silverado 1500 4.8L Hesitation, MIL Lamp on, backfires
checked fuel reg, working fine & not leaking, unpluged downstream o2s, ran better but still set same codes, plus set codes for low activity on sensors, ofcorse, i have also sprayed intake for leaks, fuel trims had no change. i also checked fuel volume, plenty ...
Summary posted 6/20/2007
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Related Documents & Media | VIN | 2GCEK19V7X |
| Engine | 4.8 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Hesitation, MIL Lamp on, Backfires |
| Occurs | Under Load, on Accel, Intermittently |
| Misc. | Downstream02sensorssignallow |
Trouble Codes
| P0137 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage |
| P0157 | Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage |
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Vehicle Data
1999 Chevrolet Silverado 1500
| VIN | 2GCEK19V7X |
| Engine | 4.8 L / 8 cyl / GAS |
| Trans | 4-speed Automatic (Electronic) |
| Delivery | FI |
| Emissions | OBD-II Compliant |
| Symptoms | Hesitation, MIL Lamp on, Backfires |
| Occurs | Under Load, on Accel, Intermittently |
| Misc. | Downstream02sensorssignallow |
Trouble Codes
| P0137 | Heated Oxygen Sensor (Bank 1 Sensor 2) Circuit Low Voltage |
| P0157 | Heated Oxygen Sensor (Bank 2 Sensor 2) Circuit Low Voltage |
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