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Check light on after driving with the cooling system low on fluid and the engine hot?

Tiny
ANNQUENETTE HALL
  • MEMBER
  • 1997 TOYOTA RAV4
  • 300,000 MILES
I ran my vehicle hot by accident. Then I put water back in it the next day the check engine light came on and it has not turned off. Did I blow a head gasket or something when it running it hot? I accidentally left the radiator cap off for about one hour then I noticed the needle had gone to hot.
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Monday, July 11th, 2022 AT 6:25 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
Hi,

Anything is possible. What I need you to do is get your hands on a scan tool so we can identify what is turning the check engine light on.

Here is a quick video showing how it is done:

https://youtu.be/b2IJGfImVvw

If you don't have a scanner, often times most parts stores will lend one to you.

Let me know.

Joe
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Monday, July 11th, 2022 AT 9:36 PM

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