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P1491 Diagnostic Trouble Code Discussion for March 2011

EVAP Vacuum Cut Valve/Bypass Circuit Malfunction


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Trouble Ticket Help Requests for DTC P1491
Help Request Posted
1998 Acura TL 3.2L MIL Lamp on VIN: JH4UA3643W
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. Customer came in 3 weeks ago with P1491 stored in the PCM. Performed all tests per MOD. I was unable to get any components in the EGR system to fail at the time. I came to the conclusion that the EGR lift sensor was failing intermittantly. Replaced EGR valve &...
March 09, 2011
1998 Acura TL 3.2L MIL Lamp on VIN: JH4UA3643W
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. Customer came in 3 weeks ago with P1491 stored in the PCM. Performed all tests per MOD. I was unable to get any components in the EGR system to fail at the time. I came to the conclusion that the EGR lift sensor was failing intermittantly. Replaced EGR valve &...
March 10, 2011
2002 Honda Odyssey EX 3.5L MIL Lamp on, TSC Light on VIN: 2HKPL18662
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. ... on when driving at same time TSC light comes on the check engine light comes on.Scanner reads two fault codes both P1491.Also saw code one time only P1676 (has not returned) Cleaned EGR valve and reset computer by removing fuse #13 After short cruise both ...
March 10, 2011
1998 Acura TL 3.2L MIL Lamp on VIN: JH4UA3643W
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. Customer came in 3 weeks ago with P1491 stored in the PCM. Performed all tests per MOD. I was unable to get any components in the EGR system to fail at the time. I came to the conclusion that the EGR lift sensor was failing intermittantly. Replaced EGR valve &...
March 09, 2011
1998 Acura TL 3.2L MIL Lamp on VIN: JH4UA3643W
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. Customer came in 3 weeks ago with P1491 stored in the PCM. Performed all tests per MOD. I was unable to get any components in the EGR system to fail at the time. I came to the conclusion that the EGR lift sensor was failing intermittantly. Replaced EGR valve &...
March 10, 2011
2002 Honda Odyssey EX 3.5L MIL Lamp on, TSC Light on VIN: 2HKPL18662
P1491: EGR Valve Lift Sensor Insufficient Flow Detected. ... on when driving at same time TSC light comes on the check engine light comes on.Scanner reads two fault codes both P1491.Also saw code one time only P1676 (has not returned) Cleaned EGR valve and reset computer by removing fuse #13 After short cruise both ...
March 10, 2011