P0139 02 Sensor Circuit Slow Response (Bank 1 Sensor 2)
Technical Description
Oxygen Sensor Circuit Slow Response (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.
This involves the rear oxygen sensor on the driver’s side. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use. Bank 1 is the is the bank of cylinders that contains cylinder #1.
Symptoms
Causes
A code P0139 may mean that one or more of the following has happened:
Possible Solutions
The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is more than likely the rear driver’s side oxygen sensor. You will likely wind up replacing it but you should also consider these possible solutions:
Need help?
Let us fix your problem. You are most welcome our diagnosis experts have in most cases the knowledge and skills to find the cause of the error code p0139 and to solve the problems.
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"Delete Error Code Permanently, Disable DTC Error Code Function for p0139 in the ECU"
In extreme cases, we even have the option to permanently remove the specific DTC p0139 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 p0139.
