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Check engine light off after check codes

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Old 02-02-2012, 07:17 PM   #1
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Check engine light off after check codes

my truck spit out a check engine light so i went to go have it read.

after reading code, i started my truck again and the light doesn't come on any more.

i think the code got erased but the tech at the auto parts store said he wasn't going to clear it, so if he did it was an accident. although i not sure if computer will let you clear it unless you disconnect battery for a while or fix the problem.

i figure if it wasn't just a random mishap (since truck runs fine) it will come back on. is that a safe assumption or not?

code was (P0115) engine coolant temperature sensor if that matters any.
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Old 02-03-2012, 08:12 AM   #2
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The guy probable cleared the code. If the coolant temp sensor is bad the check engine light will reappear.
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Old 02-03-2012, 09:10 AM   #3
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Quote:
Originally Posted by db View Post
The guy probable cleared the code. If the coolant temp sensor is bad the check engine light will reappear.
what i was thinking as well.
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Old 02-03-2012, 04:07 PM   #4
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Yes it can happen. Check for a code, read it, and just disconnect and it clears. Have no idea why... Could be a glitch in the software of the scan tool.
My hand held has done it a couple on times in the past few years. If it happens again and it's the same code then get it looked at.....
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