Po135 engine code Toyota Corolla Calida

[Andy Rogerson]

Hi Everyone 

New to the forum and wondering if anyone one on here has had this issue with the po135 engine code. 

I have owned this car for 9 years and have to say it's one of the best I've ever owned.

However recently I'm having problems with trying to resolve this issue. I've had the bank 1 sensor 1 changed (to no avail) engine light still on. Even changed the catalytic converter (still engine light on) 

Has anyone else had this issue/problem and managed to rectify it. Doing my head in. 

Car still seems to run ok and haven't noticed a change in fuel economy or rough idling (as suggest online)

Thanks in advance 

[FROSTYBALLS]

Topic moved to the Corolla forum.

[Andy Rogerson]

1 minute ago, FROSTYBALLS said:

Topic moved to the Corolla forum.

Ok thanks. Sorry didn't realise 

[Red_Corolla]

The P0135 is not for the performance of the sensor itself, but the heater circuit (they have a small heating element inside). If changing the sensor hasn't helped then it's likely there's a wiring problem.