ecu wiring

I am humbly asking the community for some advice on my 2006 Land Cruiser (~240,000 miles). Several months ago, I started to have issues where the truck would crank fine, but wouldn’t fire. Diagnostics pointed to the immobilizer; my usual mechanic said that it would have to go to a dealership...

Driving myself crazy with this one, as it's causing me to get a whopping 8 MPG. Consistent P0125 code with intermittent P0130 and P0133. FSM points to a bad O2 sensor, wiring to the O2 sensor, or bad ECU. Replaced sensor with Denso, no change. When I run my scanner, I'm not picking up any...