P0401 Diagnostic Trouble Code Discussion for April 2006
Insufficient EGR Flow Detected
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| Help Request | Posted | |
| 1999 Pontiac Grand Prix SE 3.1L MIL Lamp on VIN: 1G2WJ52M4X P0401: Insufficient EGR Flow Detected. egr ports are restricted,(still has slight flow) i have verified this. can the passage ways on this 3.1 be successfully cleaned by removing the upper intake plenum, or would the lower need to be removed as well. customer recently had this to the dealer and the... |
April 12, 2006 | |
| 1998 Toyota Camry CE 2.2L MIL Lamp on VIN: JT2BG22K6W P0401: EGR System Insufficient Flow Detected. ... light. Scanned computer for codes and found code #P0401. Tested vacuum to valve and verrfied valve needs to be replaced. After replacing EGR valve and vacuum modualtor, code is till coming back on. EGR solenoid seems to be working and Valve is holding pres... |
April 12, 2006 |
