Error code p0305, p0131, p0151, p0137, p0157 P0305 is reading cylinder 5 misfire detected P0131 O2 sensor circuit low volts (bank 1 sensor 1) P0151 O2 sensor circuit low volts (bank 2 sensor 1) P0137 O2 sensor circuit low volts (bank 1 sensor 2) P0157 O2 sensor circuit low volts (bank 2 sensor 2) All 4 oxygen sensors were recently replaced. The spark plug for cylinder 5 was broken and all spark plugs were recently replaced. I did have oil leaked into the cylinders before and the gasket was replaced recently also.
Reset error codes by disconnecting battery for 5 minutes. Start fresh. all codes should be clear now. drive and see if any new codes come on. They are the ones you need to address.
SOURCE: how do i fix my 2001 cadillac catera idle problem
The problems you are describing indicate to me that you likely need to replace the coil pack that runs from the spark plugs ,and the plug wires end up at it.It also may be the spark plug wires,get a water bottle and spray the wires after dark and if you get a light show from them then replace them,if not,replace the coil pack.
SOURCE: Check Engine Light. I have a 03 escalade that
Your fuel pressure is WAY to low, it should be at least 55 PSI, (spec is 55-62 PSI) You will need to replace the fuel pump and the fuel filter then clear the codes and retest, the fuel pump is located inside the fuel tank, the fuel tank must be removed to access the pump. after the fuel pump is replaced if any lean codes come back from the O2 sensors the intake maniold gaskets will need to be replaced as well, they are a common problem as well but your main problem is very low fuel pressure, this alone will set all the codes you have.
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