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The code first appeared at around 110,000 miles during a round trip a couple years back. At that time, I cleared it using a scanntool from a parts...
I just wanted to add that I had a similar experience with the P0171 code. I took it to a local Toyota dealer and at first, said it was a cracked...
I assumed the ECT sensor (the one on top of the engine toward the driver side) is working because I'm reading the ECT temp with my OBDII scanner....
Well, the overheating is definitely related to the two radiator cooling fans not coming on. While slowly driving around in the hills, I let it...
Thanks for the manual section for the ECT sensor replacement. Thermostats can fail in the open or closed position.
Yes, I can read live data from 39 parameters. ECT is one of them. That is how I got the correlated temp events I listed in post #10.
If I'm reading the ECT from my scanner connected to the ECU, then doesn't that mean the ECT sensor is working and it is registering properly with...
Thanks, I'll look up how to check the ECT sensors. How many are there?
First, NutzAboutBolts is an awesome resource with the Youtube videos. Thank you for your contributions to the DIY community. Regarding the fans,...
Ray, I'm using the Innova 3130e and reading the live data for the engine coolant temp. I can't hear the water pump over the engine noise. But I...
Also, at what temp does the over temp light come on?
JZ, great advice. Before I started pulling things apart, I put the Prius in "maintenance mode" and then ran the engine to get it up to temp. I...
I decided to go with replacing the thermostat, I just picked up a new one from Toyota. Mendel, do you have any words of wisdom you have after...
While I was climbing a hill on my way home on a hot (100F) day, the engine over temp light came on. I immediately pulled over in the shade. There...
