Fortuner radiator oil pressure defective error

Interesting. I had similar symptoms on my Fortuner. Was the cooling fan running erratically, or maybe not at all? And did you check the transmission fluid level? I'm wondering if it might be related to the pressure sensor on the radiator.

Cooling fan seems okay, and fluid levels are normal. But a faulty pressure sensor... Wouldn't that usually trigger overheating? Is there any way to test the sensor or confirm that's the problem?

It could lead to overheating eventually, but the sensor issue can manifest in other ways first, especially if the signal is intermittent. Does it only happen when the engine is hot? Honestly, with those symptoms and the error code, I'd get it to a workshop to properly diagnose the electrical connections. They have the tools to pinpoint it. I suspect you're on the right track.

Thanks! I had a defective cable. The workshop replaced it. Cost me 95€. All good now!