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P1153 Chevrolet -

this is on a 2004 silverado 2500 with a 6 liter engine
codes P0171 and P0174 also came up along with P0300

Vehicle: 2004 chevy silverado 6 liter engine
asked Jul 27, 2013 by Vince Webster

2 Answers

You may have more than one problem. I would start by checking for intake air leaks (which can also cause the P0300 code) or replacing the front (upstream) O2 sensor.

P0171 Chevrolet - Fuel Trim System Lean Bank 1

Read more: https://www.autocodes.com/p0171_chevrolet.html

P0174 Chevrolet - Fuel Trim System Lean Bank 2

Read more: https://www.autocodes.com/p0174_chevrolet.html

P1153 Chevrolet - HO2S Insufficient Switching Bank 2 Sensor 1

Read more: https://www.autocodes.com/p1153_chevrolet.html

 

 

answered Jul 27, 2013 by OBDIITech (2,804 points)
P1153 H02S (oxygen sensor) bank 2 sensor 1

P0171 Fuel trim lean bank 1

P0174 fuel trim lean bank 2

P0300 Random misfrie

Lean condition are mainly caused by vacuum leaks, low fuel pressure, MAF (mass air flow) The vacuum leak can come from a EGR valve that is partially open,  Vacuum leak from the PCV valve or even at the plenum and intake manifold gasket, As for the fuel pressure the specification are 55-62 psi with key on and engine off,
answered Jul 27, 2013 by Reynaldo (10,835 points)

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