Hey folks, hoping someone can shed some light or offer some guidance.

My 2016 TLX V6 was dropping a P0154 and P2254 error. Grabbed a new O2 sensor (Denso after reading on here that other brands wont work/or last). Got it installed yesterday fairly straight forward but after jumping back in the car and resetting the radio code I started getting a P0155. Tried resetting the code and it comes back immediately.

Wondering if anyone has any advice on next steps to troubleshoot. I did grab 2 sensors with the idea of replacing both so I might try the second one on the off chance it was a dead unit.

Would prefer to not bring it into the dealer and my go to mechanic is 1.5hr away since I moved so I only go for large jobs now.

 

swap the sensors from Bank 1 to bank 2 and see if the code moves. If it does, then it's the sensor. If not, it's a wiring issue or ECM issue.

 

Couldn't get the rear off but I bought two cause I planned to replace both so trying the second sensor today... so far no codes but we'll give it a bit of driving and hope for the best!

Thanks!