engine light comes on and l scan the truck then l got code po 150 it means malfunction circuit to bank 2 sensor 1
i would like to know how l can fix it.

The O2 sensor produces a voltage based on oxygen content in the exhaust. The voltage varies between .1 & .9 Volts, .1 indicating lean & .9 indicating rich. The ECM constantly monitors this voltage while in closed loop to determine how much fuel to inject. If the ECM determines that the O2 sensor voltage was too low (less than .4 Volts) for too long (for more than 20 seconds (time varies with model)), this code is set. The code P0150 refers to Bank 2.

If the problem is constant, then symptoms may include one or more of the following:

MIL illumination
Engine runs rough, missing or stumbling
Blows black smoke from tail pipe
Engine dies
Poor fuel economy

Usually the cause of P0150 is a bad oxygen sensor, however this is not always the case. If ur O2 sensors have not been replaced & they r old, it is a good bet that the sensor is the problem. But, it could be caused by any of the following:

Water or corrosion in the connector
Loose terminals in the connector
Wiring burnt on exhaust components
Open or short in the wiring due to rubbing on engine components
Holes in exhaust allowing unmetered oxygen into exhaust system
Unmetered vacuum leak at the engine
Bad O2 sensor
Bad PCM