Question about Suzuki Cars & Trucks
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Posted on Jan 02, 2017
Try and see if the vent hose from the filler neck to the tank is kinked or plugged, if those are ok there must be a gas tank vent solenoid stuck closed.
Posted on Dec 31, 2008
get the filler hose checked out as it may have a spring inside it to hold its shape or something has been dropped inside restricting it!
Posted on Jul 20, 2009
Try taking the gas cap off, and put it back on securely. Then have the check engine light reset. Drive on it for about 50 miles, and if does come back on continue onto other emissions related problems that link to that code (exhaust manifold perhaps).
answering this question with a vague "probably sensor has gone bad" will just have you running around in circles like a decapitated chicken. Take your time, don't rush, and don't throw parts into your car thinking it will solve the problem...sometimes the smallest mistake can turn this like on.
Posted on Jan 21, 2010
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There will likely be no noticeable symptoms other than the Malfunction Indicator Lamp (MIL). This is because the EVAP system is a closed system and only controls fuel tankvapors, not engine management.
Usually this P0456 code is caused by an incorrect or faulty gas cap. Filling the fuel tank with the engine running could conceivable cause this code as well or if the cap wasn't properly tightened. Any of the following could also be the cause:
First, using a scan tool activate the vent solenoid, sealing the system. Then monitor the fuel tank pressure (FTP) sensor. If the system is sealing properly, the number will stay consistent. If is isn't, the pressure sensor will show that as well. If the system slowly leaks, use a smoke machine and watch for smoke exiting the system at any EVAP component. Any where there is smoke exiting the system, that is the faulty component. Do not pressurize the EVAP system with air pressure. Doing so can damage the purge and vent solenoids in the system.
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