P0401 Diagnostic Trouble Code Discussion for March 2015
Insufficient EGR Flow Detected
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| Help Request | Posted | |
| 2002 GMC Sierra 2500 HD SL 8.1L MIL Lamp on VIN: 1GTHK23GX2 P0401: Insufficient EGR Flow Detected. 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? |
March 04, 2015 | |
| 2000 Buick Park Avenue Ultra 3.8L MIL Lamp on VIN: 1G4CU5415Y P0401: Insufficient EGR Flow Detected. ... Buick Park Ave. with a 3.8 super charged engine, that is setting a p0401 on every test drive. EGR valve has been replaced, EGR valve does move to 100% when commanded and vehicle starts to misfire and run rough when commanding it. Removed EGR tubes and insp... |
March 09, 2015 | |
| 2009 Ford Crown Victoria Police Interceptor 4.6L MIL Lamp on VIN: 2FAHP71V89 P0401: EGR flow insufficient. ... has an E.G.R. and A/C issue. The car runs perfectly at idle and cruise. With the Solus Pro hooked up and car warmed up, the O2S sensors look good switching with cross counts at idle and up the range and the after Cat readings are steady. When we run the KO... |
March 09, 2015 | |
| 2000 Buick Park Avenue Ultra 3.8L MIL Lamp on VIN: 1G4CU5415Y P0401: Insufficient EGR Flow Detected. ... Buick Park Ave. with a 3.8 super charged engine, that is setting a p0401 on every test drive. EGR valve has been replaced, EGR valve does move to 100% when commanded and vehicle starts to misfire and run rough when commanding it. Removed EGR tubes and insp... |
March 10, 2015 |
