Question about 2007 Subaru Impreza 2.5
My oil pressure switchs are constantly bursting (the fail-safe on top of the sensor ponctures) and check engine goes on. I've changed the two sensors twice and just changed one for the third time and it just bursted again.
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Posted on Jan 02, 2017
SOURCE: 91 LEGACY STARTED RUNNING ROUGH
The cylinders are numbered as on the spark pack you changed. You might have done better putting the seafoam in the tank as an injector cleaner. Not sure why you changed so many parts, you seem to know how to get the codes from test connector lead hookup and the blink pattern. You might also want to check the fuel rail pressure and the crank and cam angle sensors. Before replacing the injector, swap the #4 injector with the adjacent one and see it the code moves with the injector or stays put. If the code stays on #4, then check the injector wiring, if it moves clean or replace the injector.
Posted on Mar 21, 2009
SOURCE: Engine check light comes on
Have you tried disconnecting the battery for half an hour to reset the computer? If that doesn't work I think the Vacuum Pressure Sensor is in the black box with all the vacuum hoses going to it beside the air filter housing. Not sure tho, subaru will tell you where it is & how to test it if you ring them & ask for the workshop.
Posted on Apr 10, 2009
At 100,000 miles or in your case, when the O2 Sensor fails,
you replace one or two, if that applies
You replace the ones closest to the engine
If dual exhaust,then you do both sides
Bank A or Sensor 1 Bank 1 is on the side that cylinder
#1 is on
Sensor 1 Bank 2 the other side
You do not have to do the rear or monitor sensors,
they are for catalytic efficiency or converter check
of how it is doing.
Front --pre cat
Rear --post cat
Posted on Jul 04, 2011
I would change it anyway. I would scan it again and see if the knock sensor code is stored.
Posted on Jul 10, 2011
Testimonial: "Thanks. Makes sense to me."
You have to hook an OBD 2 scan tool up to the data link connector and check to see what code is present. If you have a knock sensor code, you need to replace the knock sensor. If you get a P0420: Catalyst system efficiency below threshold, you will need to replace your catalytic converter. But if it is nothing important, the only way to clear a check engine light is with a scan tool. You can usually go to any aftermarket parts store and they will check and clear you codes and light for free. I hope this info helps.
Posted on Aug 01, 2011
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Fig.: Oil pressure switch (sending unit) schematic
The low oil pressure warning lamp will illuminate when the ignition switch is turned to the ON position without the engine running. The lamp also illuminates if the engine oil pressure drops below a safe oil pressure level. To test the system, perform the following:
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