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P1491 Diagnostic Trouble Code Discussion for June 2007

EVAP Vacuum Cut Valve/Bypass Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1491
Help Request Posted
2002 Chrysler Town & Country Limited 3.8L MIL Lamp on VIN: 2C8GP64L92
P1491: Radiator Fan Control Relay Circuit Malfunction. Van came in for MIL on with P1491,couldn't recreate problem, Tech replaced Rad fan relay, A week later MIL on again w/P1491. Did some testing with scanner and lab scope. ran fan relay w/scanner and watched scope pattern @ relay cicuit,saw a couple of times the...
June 26, 2007