I have codes:

P0136
P0031
P0051
P0132
P0152
P0138

I changed my down stream o2 sensor and that didn't work. Can anyone steer me in the right direction please?

 

The codes are all related to voltages being out of whack. Carefully check the wiring from the sensors to the PCM.

 

P0136 O2 Sensor 1/2 Heater Circuit Malfunction
P0031 O2 Sensor 1/1 Heater Circuit Low
P0051 O2 Sensor 2/1 Heater Circuit Low
P0132 O2 Sensor 1/1 Circuit Voltage High
P0152 2/1 O2 Sensor Shorted to Voltage
P0138 O2 Sensor 1/2 Circuit Voltage High

 

What brand of sensor did you use? i've read on this site that a certain brand works better. and it appears you have an issue with the upstream sensor and/or its wiring too.

 

Actually, it's whining about all three sensors. California emissions??