I am new user/ new owner of a Prius 2009 I bought a 2009 Prius with 248 000kms in it and after about 3 days there came a big triangle warning on dash with exclamation mark. I used a OBD2 scanner but no error codes. Then I went onto check battery (12V) without engine ON voltage was about 11.9 with engine ON it is 13.8 V After about 5-6 hours I realised no Big triangle sign/ exclamation on dash I went to an auto shop and check ed the 12V battery and the reading was 12.25V CCA measured 267 CCA (rating 370 CCA) The battery is AGM 5511 battery and as per the previous owner of the car who had it for 10 years, battery was never changed. ( I doubt it) Does this mean my 12V battery is bad? or brake actuator failure (as a friend of mine suggested)
I think more than likely that cheap think scanner just can't see all the computers in the car to get you your codes the red tri. Is telling you pike hayeee take a peek over herr at this orange light .... Your scanner may not know what that orange light is attached to so it thinks all systems go . Cars got too much going on for some tools
I took a quick look at thinkobd 100 and it's a BASIC OBD2 reader for ICE cars. NO access to ABS or Traction battery ECUs - It's only looking at the ICE ECU. So go find a better scanner that will scan ALL ECU's in that car. If it threw a red triangle, there's a error code stored someplace. Good Luck.. BTW; if you had an actuator issue, you'd also get traction control lamp. Get the 12V battery tested; 11.9V isn't low enough to trigger anything. That happens closer to 10.5V.
It means that you need a better scanner to read the trouble codes. If the warning lights are on, there are trouble codes that should be read. Read post #1 and then scroll down to post #37 in this thread, https://priuschat.com/index.php?posts/3246758 I recommend the Autel AP200. It is a Bluetooth OBD2 dongle and you install the Autel app on your phone. You need internet connection to set it up. Posted via the PriusChat mobile app.
I got the car checked at a Hybrid expert and they could not find any faults with main battery or the 12V battery-He also thinks the warning may have come up from drained 12V battery. I did a 1.5 hr drive at 70-80kms most o the time , so hopefully it will charge up 12V battery. Slight relief (fingers crossed).
Yep. 12V battery with low voltage causes red triangle. (Although based on my experience it's not consistent). (Had it most recently today. Or technically yesterday. I was scanning codes and the triangle appeared. Cause was that the car had managed to suck my 12V down to 10V. Battery capacity must have gotten very low. My fault as there have been a few times I have forgotten to disconnect the 12V battery after driving or thought that I would be driving again soon, but didn't.
