Question

I have a 2005 Chevy Express and it has Code p0300 - P0152 - P0154 popping up! What can I do?

The engine runs good but sometimes very randomly it starts to hesitate and lose power. I drove it 500 miles and it did this one time for about 3 minutes and wast fine the rest of the time.

Answer 1

P0300 Random misfire

P0152 H02S circuit high Bank 2 Sensor 1

P0154 H02S circuit insufficient activity Bank 2 Sensor 1

Bank 2 Sensor 1 is the upstream 02 sensor, Having a circuit high 02 sensor or even a insufficient activity with the 02 sensor is not going to set a P0300, When the ECM set a P0154 or a P0152 there no need for it to set a P0300. These are separate problems, Random misfire condition and randomly hesitate this is where a P0300 will set, The fuel pump is very susceptible, in causing this type of condition, the problem is the fuel pressure will test okay , if the engine cuts out , and its a intermittent condtion, this is where the fuel pump is suspected.