Question about Subaru Cars & Trucks
P0457 code: evap small leak detected. changed gas cap. What can it be?
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: fuse box location on 2002 Subaru
my books say there are two. one inside vehicle on drivers side below dash to the left of the steering wheel. the other is in the engine compartment on the drivers side by fender
Posted on Jan 09, 2009
You need to check the purge and vent solenoids for proper operation. You need to check the pressure sensor for out of range ( defective ). You need to check the filler neck for cracks and make sure the clamps are tight. You need to check the vapor lines for loose fit. I've seen at the charcoal cannister where the lines connect it may not be on strait. A smok test will reveal this if its not sealing. You may have a leaking rollover valve or fuel pump seal on top of the tank. You may just have a vacuum leak under the hood, These trucks have an Evap management valve also that can be leaking or out of specs. Look on the emmisions lable or vacuum chart under the hood. This will show you the underhood components.
Posted on Jul 15, 2009
It is probably a sensor that goes by the gas tank. I belive it is called a Fuel Vent Sensor Circuit. That should fix the problem.
Posted on Dec 16, 2009
your problem is probably a vacuum hose that goes from the purge valve to the gas tank (crack or broken hose). There should be two of these check both. A broken vacuum line will make the purge valve make a clicking noise that can be mistaken for noisy engine valves.
Posted on Apr 28, 2010
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ECT sensor less than 90°F at startup, engine running, and the PCM detected several small fuel vapor leaks or a large leak in the system.
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