P0158 DTC

[Jbert93]

2019 Chevy Silverado LTZ 6.2

25,000 Miles 

Whipple 3.0L
 

o2 circuit high voltage. Bank 2, sensor 2.  I swapped my pcm and just installed a whipple and for the life of me I can not clear this DTC. I started with the sensor and verified it was fine by swapping with the other down stream sensor. I checked the o2 sensor for resistance.  I checked the connection and verified the PCM was closing the ground circuit to the sensor. I also checked the heater positive and negatives at the plug for operation. However, when I start the vehicle. Both downstream sensors stay at 1.107v until it warms up. The left side(working side) then stabilized around .720v and the right side(broken side) never fluctuates from the the 1.107v. This in return triggers the P0158 02 circuit high voltage. Does anyone have a wiring diagram or any suggestions on how to proceed. 
 

thank you,

 

-Jeff

[bjr2020 6.2]

I’d ask this question on like the hptuners forums maybe? Those guys are tuning these new trucks already.