Question about 2004 Subaru Outback 2.5
Loss my throtttle control on the way to work, engine check light on, engine running fine. Small mouse nest on top of thottle body. After work looked for chewed cables, found none. Engine started and thottle worked. Drove home attached code reader P2138 (downstream O2 sensor high voltage) Any ideas?
That error is not the O2 sensor. It is tjhe throttle or gas pedal postion sensor. It is on the floorboard attached to the foot feed for the throttle. IT gets dirty, wet, loose etc. Check it, clean it, reseat it and if all else fails...replace it.
Posted on Mar 29, 2014
Testimonial: "Thanks "brother' for the advice. We've had one storm after another here in the NW with incredible downpours and landslides. I do park "suby" in the garage at night but it is outside during the day. Trapped a mouse too! S. Brown"
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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
How long did the car run before the light cam back on? I don't know what type of OBD tester you have, Does it show the values of the O2 sensors.
Posted on Aug 06, 2009
check you dont have a split in the corrugated pipe from the maf to the swirl chamber (the big black plastic tank attached to the inlet manifold) or a leak into the intake somewhere, doesnt have to be a small vac tube.
Also you may have a sticking TB butterfly as my learned friend suggested.
Posted on Dec 02, 2009
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