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Could be an EGR port clogged with carbon. Remove and clean EGR and EGR ports.
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98 Honda Prelude error code P1491?
Code P1491 Means: EGR Valve Lift Insufficient Detected EGR Valve needs to be replaced
Have a p1491 code on 2001 frontier Nissan what's going on?
in my haines manual, it says a p1491 is a vaccum cut bypass valve or circuit fault.
2001 Honda Prelude how to fix code p0505?
seek to find code 504 and it will lead you that will help give you further instructions about code505!!.
What is check engine light code p1491 on 2003 Jeep liberty?
what is this code p1491 on 2003 jeep liberty
What does OBD code P1491 mean?
P1491 - Radiator Fan Control Relay Circuit
What p1491 mean for Honda Prelude?
It means yor getting unsufficent lift from your egr. Best thing to do is check connections possibly replace if need be. I replaced mine code went away for a lil while and then came back so could be egr or wiring or your ecu
Dodge Caravan code p1491?
Trouble code P1491 means: Radiator fan relay control circuit Can I get a location?
What is Code 700 on a 1997 Honda Prelude?
Code 700 means: A/T Concerns
'What is ODB2 code P1491 for 2002 Dodge Grand Caravan?
Trouble code P1491 means: Radiator fan relay control circuit
What does the p1491 code mean on a 1997 Jeep Cherokee Sport?
P1491 = radiator fan relay circuit
What is check engine code P1491 for 2002 dodge durango?
P1491 Rad Fan Control Relay Circuit
What does P1491 codes mean on a 2003 Chrysler minivan?
Trouble code P1491 means: Radiator fan relay control circuit
