 
				
	| 2008 GMC Sierra 2500 HD WT 6.6L Derate I am seeing this more and more. Truck with a p0101. Customer states intermittent. Customer replaced own maf with oem par. He does have a K&N filter but new. I monitor grams per sec and they are with in value. I have also put in oem filters and the problem stay... 
                        
                            Summary posted 4/6/2016
                               
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 | Message Closed w/Summary 
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| VIN | 1GTHK23678 | 
| Engine | 6.6 L / 8 cyl / DIESEL | 
| Trans | 6-speed Automatic (Electronic) | 
| Delivery | Fuel Injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | Derate | 
| Occurs | Intermittently | 
| Misc. | P0101 | 
Trouble Codes
| P0101 | Mass Airflow Sensor Range/Performance | 
| P2563 | Turbocharger Boost Control Position Sensor Performance | 
Message Closed w/Summary
            
             Vehicle Data
 Vehicle Data
                2008 GMC Sierra 2500 HD WT
| VIN | 1GTHK23678 | 
| Engine | 6.6 L / 8 cyl / DIESEL | 
| Trans | 6-speed Automatic (Electronic) | 
| Delivery | Fuel Injection | 
| Emissions | OBD-II Compliant | 
| Symptoms | Derate | 
| Occurs | Intermittently | 
| Misc. | P0101 | 
Trouble Codes
| P0101 | Mass Airflow Sensor Range/Performance | 
| P2563 | Turbocharger Boost Control Position Sensor Performance | 
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