A correction; I actually got a P1135 code but then I cleared the code and it didn't come back. I got a P1155 code which got stored and stayed until replacement.
Below are links to the videos where I got the fake rear sensor;
Fake Rear Sensor Denso 234-9007: • What to look out for when shopping for Air...
Real Rear Sensor Denso 234-9007: • FINALLY GOT THE RIGHT SENSOR? Denso 234-90...