What is your question?
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What is your question?
A week ago I was going home and one of a sudden I felt like I lost power but it would still speed up. Right when I got home I stopped and left it on for a bit and was giving me misfiring codes on cylinder 1 and 3 and so I changed the spark plugs and coil packs and still idles really rough and sometimes it like gives out. Right before this happened I remember it was giving me the P0137 Code but it would drive just fine. Would a O2 sensor that went out could be causing this? I really need help!
What makes this problem better or worse?
It rough idles very bad when the engine is cold
How long has your 2011 Subaru Impreza had this problem?
1 Week
1 Reply
Hello, The O2 sensor sniffs the exhaust for the amount of oxygen remaining and tells the engine control module (ECM or PCM) that value. Now when the PCM gets the information, it starts to add or cut fuel, because only the driver can decide how much air the engine gets (how much you press the gas pedal). So, if it senses too little oxygen, the engine will restrict fuel. That, however, has a systemic effect, so all cylinders would have restricted fuel, not just the 2 cylinders on one side of the engine (1 and 3). Based on that logic, no, would have a P0300 code, not a P0301 and P0303. Knowing the engine in your vehicle, the very first thing I would do is compression check that side of the engine. They tend to eat head gaskets. Bad situation, but just reply to this thread as often as you need for assistance. You also might just have a leaking intake manifold gasket on that side letting in too much air.