Hey so I got a a P0138 code on my 1996 Tahoe and replaced the O2 sensor to see if it solves the problem but the check engine light came back on with the same code. The code P0138 is an O2 sensor circuit high voltage (bank1, sensor 2). The possible causes are:
Faulty o2 sensor
short to battery voltage in o2 sensor signal circuit
high fuel pressure (not likely)
I tried the o2 sensor but it didnt solve the problem. Have you guys ever had this problem? I don't really have an idea on how to check or repair the second cause so any help would be appreciated.
Thanks in advance.
Faulty o2 sensor
short to battery voltage in o2 sensor signal circuit
high fuel pressure (not likely)
I tried the o2 sensor but it didnt solve the problem. Have you guys ever had this problem? I don't really have an idea on how to check or repair the second cause so any help would be appreciated.
Thanks in advance.
