Light just came on the other day. I have the following codes all at once. P0136, P0139, P0303, P0304. What would cause these all at once? It says misfire in cylinder 3 & 4. As well as O2 sensor circuit malfunction and slow response on bank 1 sensor 2. Any ideas?
did you fix the problem? i would change the o2 sensors first and reset ecu.
the cylinders 3 & 4 misfire codes, could you tell if there actually was a misfire occuring? I second the replace O2 sensor recommendation. Do you have a scan tool to watch live data and see the output of the sensor?
-Rick
1998 Outback-Lift kit, plasti dip camo tan, 03 WRX calipers, slotted rotors, header, high flow cat, custom 2 1/4 catback, vibrant muffler, fresh rebuilt .020 over EJ25D w/ 251 block, strut tower bar, etc...
04 35th anniversary H-6 Outback-Dynomax VT Muffler, power mode mod, not much else......yet!
85 V65 Magna
86 'Zuki Quadsport-fun machine
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