P0138 02 Sensor Circuit High Voltage (Bank I Sensor 2)
Technical Description
O2 Oxygen Sensor Circuit High Voltage (Bank1, Sensor2)
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model.
The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter. Bank 1 is the side of the engine that contains the #1 cylinder.
Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)
Symptoms
There may be no noticeable symptoms except for MIL illumination. Possible high fuel pressure can over rich the system.
Causes
A code P0138 may mean that one or more of the following has happened:
Possible Solutions
Here are some potential solutions:
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"Delete Error Code Permanently, Disable DTC Error Code Function for p0138 in the ECU"
In extreme cases, we even have the option to permanently remove the specific DTC p0138 and disable the function of the specific error code in the ECU. All other fault code functions will then continue to work to protect the engine. This is different from clearing an error code with a diagnostic device. We have the option to permanently remove the function of the specific error code, so that it never comes back. Also emergency running that occurs on the specific error code can be solved in most cases.
Of course we prefer to first try to solve the cause of the error code, but sometimes the only solution is to permanently disable the DTC function of p0138.
