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	 1999 Volkswagen Golf GTI 2.0L MIL Lamp on 
		
		Has codes p0140 p0141 & p1128. Car has had light on for a while and not sure when each code set. Secondary 02 is stuck at .450 volts in closed loop at all rpms including snap throttle. Maf sensor at .298gs @ idle. leaning to replacing MAF and Both 02's, But wo... 
                        
                            FIX posted 1/25/2008
                             
                 
                            
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           Message Closed w/FIX 
	   
	   
	   
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| VIN | WVWDA31J6X | 
| Engine | 2.0 L / 4 cyl / GAS | 
| Trans | 5-speed Standard | 
| Delivery | FI | 
| Emissions | OBD-II Compliant | 
| Symptoms | MIL Lamp On | 
Trouble Codes
| P0140 | Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity Detected | 
| P0141 | Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction | 
| P1128 | MAP Sensor Signal Lower Than Expected | 
Message Closed w/FIX
            
            
 Vehicle Data
                1999 Volkswagen Golf GTI
| VIN | WVWDA31J6X | 
| Engine | 2.0 L / 4 cyl / GAS | 
| Trans | 5-speed Standard | 
| Delivery | FI | 
| Emissions | OBD-II Compliant | 
| Symptoms | MIL Lamp On | 
Trouble Codes
| P0140 | Heated Oxygen Sensor (Bank 1 Sensor 2) Insufficient Activity Detected | 
| P0141 | Heated Oxygen Sensor (Bank 1 Sensor 2) Heater Circuit Malfunction | 
| P1128 | MAP Sensor Signal Lower Than Expected | 
                            
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