P1490 INFINITI - Vacuum Cut Valve Bypass Valve
When is the code detected?An improper voltage signal is sent to ECM through vacuum cut valve bypass valve.
P1490 Infiniti DescriptionThe vacuum cut valve and vacuum cut valve bypass valve are installed in parallel on the EVAP purge line between the fuel tank and the EVAP canister.
The vacuum cut valve prevents the intake manifold vacuum from being applied to the fuel tank. The vacuum cut valve bypass valve is a solenoid type valve and generally remains closed. It opens only for on board diagnosis.
The vacuum cut valve bypass valve responds to signals from the Engine Control Module (ECM). When the ECM sends an ON (ground) signal, the valve is opened. The vacuum cut valve is then bypassed to apply intake manifold vacuum to the fuel tank.
Need more help?Do you need more help with the P1490 Infiniti code? Ask a question to our users or find an automotive repair shop near you to help fix the OBDII code
P1490 INFINITI CommentsHelp us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P1490 Infiniti code? Have you replaced any parts?
Any information is appreciated. Thanks