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P0401 Diagnostic Trouble Code Discussion for January 2011

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2005 Chevrolet Silverado 2500 HD LS 6.6L Hesitation, Stall, MIL Lamp on VIN: 1GCHK23225
P0401: EGR Flow Insufficient Detected. ... P0102, P0299, P0401, P0404, P0670,P0700, P1404,P2563, U0105. I cleared codes and none came back. P0101 returns after a short road test or rev up. Scan data...
January 11, 2011
2003 Ford F-350 Super Duty XLT 6.0L Poor Idle Quality, Cuts out, Misfire VIN: 1FTSX31P83
P0401: Insufficient EGR Flow Detected. ... came in. Pulled codes...p0401,p132B, and P2285. Diagnosed faulty EGR valve. Replaced valve, and parked outside so it would get cold. Clear codes, and test drove cold. P0401, and P132B no longer reoccuring. Still had P228...
January 12, 2011
2000 Toyota RAV4 2.0L MIL Lamp on VIN: JT3HP10V8Y
P0401: EGR System Insufficient Flow Detected. Came in with PO401--replaced EGR--came back on next day--replaced every VSV valve and have cleaned ALL passageways multiple times. I finally test drove vehicle myself and I felt it lacked power. Checked cat converter and levels were off the charts. Replaced pa...
January 28, 2011
1998 Toyota Camry CE 2.2L MIL Lamp on
P0401: EGR System Insufficient Flow Detected. ... setting the mil for p0401. Found the transducer bad, replaced it and shipped car. Came back two days later and same code. Transducer working, hooked up vacuum gauge to egr, working. Read your post about tvs sticking, bypassed transducer and tvs. Egr workin...
January 30, 2011