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P1490 Diagnostic Trouble Code Discussion for September 2014

EVAP Vacuum Cut Valve Bypass Valve Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1490
Help Request Posted
2011 Isuzu NPR-HD 5.2L MIL Lamp on VIN: JALC4W161B
P1490: Refer to svc manual. -Truck towed in full limp in mode. The driver had been using vehicle with dsl fluid warning lights on for a year or more. We had the can baked and then replaced the fluid injector after we could not clear P20C9. Other codes come on on road test. Does anyone wo...
September 10, 2014