Hello!

Long time reader first time poster.

I have a 2005 hybrid, and we have the dreaded p3125 code.

I suspect a cooler pump, and have managed to get techstream going.

I am hoping to get some second opinions of the output, or where I should be looking to confirm this.

Is the MG1 temp a red herring? How about the high water temp?

Also, if anyone else looking for help getting techstream going, there's a great article just search "techstream in 5 minutes. I also watched a video on YouTube by "jafffa adventures". Hint, if you have issues with it, change your PC's clock!

There should be a sub code to go with that fault code that will allow better diagnosis of the issue. I believe MG1 on the Alphard doesn't have any temperature monitoring, so that is why it is showing zero. Which high water temp are you referring to? I can see a water temp of 83 Deg C, which is perfectly reasonable for an engine cooling system.