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Water temperature light flashing red and blue, car will not crank over

Tiny
NORBERT87
  • MEMBER
  • 2010 SUBARU LEGACY
  • 2.0L
  • 4WD
  • MANUAL
  • 159,000 MILES
Please someone help me and explain what can cause this? The car is staying outside in a parking. Every time it started for the first ignition turn. It is -9C outside but it started in colder conditions as well.
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Tuesday, January 22nd, 2019 AT 3:34 AM

2 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Hello,

Thanks for the video, it helps a lot. It looks like the battery needs to be replaced. here are two guides to help confirm the failure and walk you through the battery replacement:

https://www.2carpros.com/articles/car-battery-load-test

and

https://www.2carpros.com/articles/how-to-replace-a-car-battery

Check out the diagrams (below). Please let us know what you find.
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Wednesday, January 23rd, 2019 AT 12:00 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
If your battery is okay a controller is going out. Let's do a CAN scan to see what's going on. You can get a CAN scanner (Controller Area Network) from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Please go over these guides and report back.
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Saturday, March 4th, 2023 AT 12:07 PM

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