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	 2015 Isuzu NPR-HD 5.2L MIL Lamp on 
		
		2015 Isuzu NPR-HD 5.2L engine code p0420 recurring after normal regen. if you perform a slow regen you will get no code and be code free for 160 miles till next requested regen and you get code p0420. clear code and do slow regen no code do a normal regen ... 
                        
                            FIX posted 1/10/2020
                             
                 
                            
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           Message Closed w/FIX 
	   
	   
	   
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| VIN | JALC4W167F | 
| Engine | 5.2 L / 4 cyl / DIESEL | 
| Delivery | Fuel Injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | MIL Lamp On | 
| Occurs | Regen | 
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) | 
Message Closed w/FIX
            
            
 Vehicle Data
                2015 Isuzu NPR-HD
| VIN | JALC4W167F | 
| Engine | 5.2 L / 4 cyl / DIESEL | 
| Delivery | Fuel Injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | MIL Lamp On | 
| Occurs | Regen | 
Trouble Codes
| P0420 | Catalyst Efficiency Below Threshold (Bank 1) | 
                            
6 Replies Received
          6 Replies Received
          
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