Question

Chevrolet Tahoe with code P0154, how do I fix the code?

Answer 1

P0154 H02S circuit insufficient activity Bank 2 Sensor 1

When this code condition occurs this is more for a biased 02 sensor condition, if the 02 sensor is replaced, depending on the year of the vehicle a 02 sensor relearn must be performed, to do the 02 sensor relearn clear the code regardless If there is a code set this will cause the ECM to relearn the 02 sensor.