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2002 GMC Sierra 2500 HD SL 8.1L MIL Lamp on
Check engine light comes on and off on highway driving. Code po401. Does anyone know if the egr ports gets clogged on 8.1l engines and if it does where? do you have to remove intake manifold to clean out ports?
FIX posted 3/17/2015
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Message Closed w/FIX
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Related Documents & Media | VIN | 1GTHK23GX2 |
| Engine | 8.1 L / 8 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Intermittently |
Trouble Codes
| P0401 | EGR System Insufficient Flow Detected |
Message Closed w/FIX
Vehicle Data
2002 GMC Sierra 2500 HD SL
| VIN | 1GTHK23GX2 |
| Engine | 8.1 L / 8 cyl / GAS |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | MIL Lamp On |
| Occurs | Intermittently |
Trouble Codes
| P0401 | EGR System Insufficient Flow Detected |
Video