it's the code for bad o2 sensor. i think its the downstream one. take it to autozone and have them check it for free. then they can tell you which o2 is bad. change it and reset the code. good luck.
Trouble code P0138 means: O2 (B1 S2) Sensor Voltage High Condition
Trouble code P0138 means:O2 sensor circuit high voltage (Bank 1 Sensor 2)
Trouble code P0138 means:O2 sensor circuit high voltage (Bank 1 Sensor 2)
Trouble code P0138 means:O2 sensor circuit high voltage (Bank 1 Sensor 2)
Downstream O2 sensor circuit volts high.Downstream O2 sensor circuit volts high.
Trouble code P0138 means:O2 sensor circuit high voltage (Bank 1 Sensor 2)
Code P0138 refers to O2 bank 1, sensor 2, which is the one equipped after the catalytic converter, and may mean that one or more of these problems may have occurred:Faulty O2 sensorShort to battery voltage in O2 sensor signal circuitHigh fuel pressure (not as likely)Noticeable symptoms are usually limited to having the yellow check engine light come on.
what is p0138 code mean on 2005 toyota tundra
That is behind the catalytic converter.
Not likely. Code P0138 is------O2 Sensor Circuit High Voltage (Bank 1 Sensor 2).
It's your 02 sensor.
replace rear o2 sensor.