So I was developing a intermitten miss. Checked obd2 codes and didn't have anything. Soni sent ahead and changed all the coils and plugs. Gapped plugs according to specs. Ordered all from lexus. Now after I got that done I develop this p1135 code. Reset the system it pops back up within 30 seconds. Anyone have an idea why that would develop after the maintenance I did?

 

There's only a few parts here in the a/f heater circuit. The sensor, the wiring and connectors, the A/F sensor heater relay (in the box under the hood) and the ecu. The service manual would be good (~$20 on RockAuto). Or search for
Rx300 diagnostics pdf
RX300 electronic fuel injection pdf