Hi,

Car: Lexus RX400h 2008 UK/Japan model

I was driving my car during extreme rainfall and the engine warning light came on.

It went off again after a couple of weeks, so I assumed that something had got a bit wet and a circuit/sensor had shorted.

We've had a lot of rain where I live and the warning light came back on when I started the car the other day. The car had been stationary on the driveway for a week, so, unless I have rain leaking into the cabin (which appears dry), I think that might be a coincidence.

I've used Techstream to obtain/clear the codes.

P0138
P0606

From what I've found online, they both appear to be related to the O2 sensor / potential exhaust leaks.

I'm pretty certain I don't have any exhaust leaks - although my catalytic convertor was stolen a couple of years ago and replaced with a non-Toyota part.

The car appears to be running fine.

Any thoughts or suggestions?