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Temperature gauge goes to 50%

Tiny
LORDOLAN
  • MEMBER
  • 1998 TOYOTA TACOMA
  • 198,000 MILES
The temperature gauge goes to 50% when you start the truck 1998 Tacoma and stays there. It seems to run fine. This started about a week ago. It used to start at cold and go to 50%. Is there a problem?
Tuesday, September 18th, 2012 AT 9:18 PM

13 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
So when the engine is cold it does this?Also any codes?
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Tuesday, September 18th, 2012 AT 9:31 PM
Tiny
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  • 7 POSTS
Yes the engine is cold. First thing in the morning it goes to 50%. Anytime you start it.
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Tuesday, September 18th, 2012 AT 9:54 PM
Tiny
SATURNTECH9
  • MECHANIC
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Have you had the computer scanned for codes?
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Tuesday, September 18th, 2012 AT 10:37 PM
Tiny
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No. How do I do that? Does it cost?
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Tuesday, September 18th, 2012 AT 11:55 PM
Tiny
SATURNTECH9
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If you dont live in california most likely you can get it scanned for free at the auto parts store. Let me know what the exact code numbers are not code descriptions.
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Wednesday, September 19th, 2012 AT 12:02 AM
Tiny
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I live in California, so whatshould I do?
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Wednesday, September 19th, 2012 AT 12:26 AM
Tiny
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Yeah here in california they passed a law that auto parts stores cant read codes or loan out scan tools. You buy a cheap one amazon to just read codes for like 20 or they sell blue tooth one on ebay that works with smart phones thats like 20. Some of those can even read some liv data like what the coolant temp sensor is reading which would be handy.
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Wednesday, September 19th, 2012 AT 12:51 AM
Tiny
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So can you give me the exact name of this scan tool to look it up on Amazon or is there any other way to get this scan done without charge? Thanks
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Wednesday, September 19th, 2012 AT 1:14 AM
Tiny
SATURNTECH9
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There is aual-309 which does some live engine data there is also ms-300 which just does basic code reading.I dont know of any way to get free code reading in california.
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Wednesday, September 19th, 2012 AT 3:12 AM
Tiny
SATURNTECH9
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Lets do this first before we scan for codes when its cold unplug the coolant temp sensor if the gauge reads dead cold you most likely have a bad coolant temp sensor.
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Wednesday, September 19th, 2012 AT 3:16 AM
Tiny
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Dosen't the engine light have to be on to do a check on that? My engibne light isn't on.
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Wednesday, September 19th, 2012 AT 3:17 AM
Tiny
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OK Where do I find the "the coolant temp sensor" to unplug. I assusme its in the engine somewhere? Please be detailed.
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Wednesday, September 19th, 2012 AT 3:35 AM
Tiny
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What size engine do you have?
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Wednesday, September 19th, 2012 AT 10:05 PM

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