Posts Tagged: Corolla P0138

Corolla P0138 trouble code

May 28, 2019

Diagnose and fix Corolla P0138 trouble code Quite a few Toyota vehicles are experiencing a Corolla P0138 trouble code. P0138 extremely high voltage (short) is set when the oxygen sensor reports voltage above 1.2v for 10-secs or more on bank 1 sensor 2. Sensor 2 is located after the catalytic converter and should normally produce a near flat line response. The car’s computer conducts tests to ensure the oxygen sensors and catalytic converters are operating properly. This Toyota test is called active air fuel ratio control. The computer forces a … Read More