Having problems with your Mitsubishi Galant ?

The service engine soon light is on. I had it diagnosed and the codes were PO136 (sensor 1, bank 2) and PO141 and PO304B

Posted / edited by AnonymousUser on : 19-11-2018

Answers :

Ok, po136 is the O2 Sensor, P0141 is is the same problem and the P304 code is most likely a faulty spark plug or maybe a wire. Go to one of the Major auto parts stores and get an O2 sensor and the socket to put replace it with cost about $50 for both and replace them. After you replace the O2 sensor disconnect the negative battery terminal for 1 minute to reset the computer. Remove and clean the #4 spark plug and make sure it isn't fouled, if it is replace all the plugs. It may be a good idea to do so anyway, when the O2 Sensor malfunctions you usually end up running rich and that fouls the plugs pretty badly.
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