What is an OBD-II? @Unsealed
What is an OBD-II?  @Unsealed
Uploaded June 2019 | Updated September 2026, 2 weeks ago
Picture this, you are at your favourite camping spot or in the middle of the Simpson Desert and your Check Engine light comes on … do you want to know what your next step is? Well it’s your OBD-II port, which may very well save you!

If you haven’t experienced limp mode, the vehicle basically puts itself into 2nd or 3rd gear and stays there (assuming it is an automatic). This isn’t just a hypothetical. This is exactly what happened to a Land Rover Discovery I saw in the Simpson Desert recently. That vehicle ended up on the back of the tray-back recovery vehicle out of Birdsville. It couldn’t climb the dunes by itself.

If you think it could only happen to a Land Rover, then talk to someone who owns a Toyota HiLux, Prado or Fortuner with the 2.8-litre turbo-diesel. It may go into limp mode if the mass airflow sensor (MAF) is contaminated by dust. Last time I was outback, there was a fair bit of dust about.

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What is an OBD-II?

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