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P1491 Diagnostic Trouble Code Discussion for June 2004

EVAP Vacuum Cut Valve/Bypass Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1491
Help Request Posted
2002 Dodge Ram 1500 SLT 5.9L MIL Lamp on VIN: 1D7HU18Z62
P1491: Unknown. ... info problem and in hopes that it has appeared before to someone else, This truck was purchased at auction with the CEL on- Scan test is OBD@ Generic as our Snap on scanner is waiting for update info for '02+ so info is limited- Recieved code P1491- Unknow...
June 03, 2004
1999 Dodge Neon R/T 2.0L MIL Lamp on VIN: 1B3ES42Y8X
P1491: Radiator Fan Control Relay Circuit Malfunction. ... code p1491(rad fan control relay circuit) 1: erased code, road test confirms code 2:cycle fans with scanner, fans operate ok 3:ck wiring and connections ok 4:eraced code again run car in shop till fans go on (101 deg celcius) 5:at this time mil does not go...
June 15, 2004