Chevy 3.8 V-6 O2 Sensor Readings

[3.8L Strong]

Does anyone have any idea as to what could be causing these 2 low readings?
Readings were taken with my Actron Scanner with the engine running. I recently started up this Chevy 3.8 V-6 engine that I installed into my 2002 PT Cruiser. The engine is from a 98 Camaro. I'm getting a P0300 code along with these 02 sensor readings:
02S11 (v) 0.000 to 0.005, I believe this is the sensor on the driver side header.
02S13 (v) steady at 1.110, I believe this is the sensor aft of the catalytic converter which is gutted out. I will replace the converter later.
02S21 (v) 0.000 to 0.025, I believe this is the sensor on the passenger side header. This one is brand new which I just replaced because the previous sensor was setting a P0155 code. After I installed the new sensor the code went away and has not come back. The only code that remains is the P0300. Any suggestions? Thank you, Tommy.

[kristen]

Re: Chevy 3.8 V-6 O2 Sensor Readings

it might be reading them too hot. i had the same problem, i just ended up using o2 sims

[3.8L Strong]

Re: Chevy 3.8 V-6 O2 Sensor Readings

Thanks for your info, Tommy.

[3.8L Strong]

Re: Chevy 3.8 V-6 O2 Sensor Readings

it might be reading them too hot. i had the same problem, i just ended up using o2 sims

Before you installed the 02 sims, how was your engine running at a cold start up? What codes were setting if any? Did your mil light come on? If it did, was it blinking? And after you installed the 02 sims, did these problems go away? Thank you, Tommy.

[black98V6]

Re: Chevy 3.8 V-6 O2 Sensor Readings

for the after cat sensor, yeah just get a sim, for those other 2 sensors what about the ground? you might want to try running a grounding wire from them straight to the battery and see what happens with your readings