CHECK ENGINE LIGHT PROBLEM?
I went to Autozone and ran a check on my 2002 Subaru Impreza WRX wagon, and the printout was like this
Trouble shooting P0136
Definition:
HO2S 12 circuit condition (heated oxygen sensor bank 1 sensor 2)
Explanation:
The powertrain control module uses the oxygen sensor to calculate the air/fuel ratio in the exhaust.
Probable Causes:
1. Oxygen sensor defective
2. Fuel system running very rich or lean-check other codes first
3. Engine misfire condition-repair
4. Fuel pressure very high or low-fuel pump or pressure regulator
THATS IT
Now my question is what do I do about it, cause I am about to embark on a trip to Virginia from Oklahoma. My car has been running lean for a while but I have not felt or heard anything from the car to make me suspect any damage, Is it okay to keep driving on it?
Replace the O2 sensor. You can do this yourself, Now, bank 1 sensor 2. Bank 1 is the side of the engine that has the #1 cylinder,
sensor 2 is the second sensor from the exhaust manifold, just follow the exhaust pipe from the manifold. A O2 sensor is in the neighborhood of $50 to $60 . Yes, you can do this yourself. After you do this, you will need to get the code erased, autozone will do this for you, for free. You can still drive the car, but your fuel economy will not be as good.or the engine will not perform to its fullest.
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