 
				
	| 2000 Chevrolet Express 3500 5.7L MIL Lamp on This thing is kicking my @$$. It came in with a P0140 HO2S B1S2 insufficient activity. I scanned data and found that the sensor was reading 450 mV at all times. I ended up replacing the sensor. Code reset after a few road tests. So I hooked it up to the scope ... 
                        
                            FIX posted 7/16/2004
                               
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 | Message Closed w/FIX 
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| VIN | 1GCHG35R1Y | 
| Engine | 5.7 L / 8 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | FI | 
| Emissions | OBD-II Compliant | 
| Symptoms | MIL Lamp On | 
| Occurs | Always | 
| Misc. | Cable Company Bucket Truck | 
Trouble Codes
| P0140 | Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity Detected | 
Message Closed w/FIX
            
             Vehicle Data
 Vehicle Data
                2000 Chevrolet Express 3500
| VIN | 1GCHG35R1Y | 
| Engine | 5.7 L / 8 cyl / GAS | 
| Trans | 4-speed Automatic (Electronic) | 
| Delivery | FI | 
| Emissions | OBD-II Compliant | 
| Symptoms | MIL Lamp On | 
| Occurs | Always | 
| Misc. | Cable Company Bucket Truck | 
Trouble Codes
| P0140 | Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity Detected | 
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