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P1491 Diagnostic Trouble Code Discussion for October 2013

EVAP Vacuum Cut Valve/Bypass Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1491
Help Request Posted
2001 Jeep Wrangler SE 4.0L MIL Lamp on, alt not charging VIN: 1J4FA59S51
P1491: ldp pump circuit. replaced pcm for no charge condition-works fine for about a week and then quits charging-have checked all wiring to alternator and leak detection pump-replaced alternator for possible internal problem-pcm is reman Chrysler-checked resistance of ldp on car vers...
October 01, 2013