2006 T250 error code 08-21 high temp

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Joined
Aug 11, 2022
Messages
13
Had code 08-21 High temp come on today.

The machine didn't have any signs of the fault. I took the negative ground off the battery and cleaned the terminal and put it back on.

It was loose before I cleaned it. Is there a certain amount of time to keep it off to reset the code? Maybe I put the cable back on without giving the system time to reset?

Or is there a sensor/connection I can check to see if I need to take it to the shop or not.

I have a service manual for it, I'll check that later but thought I'd ask if anyone had real world experience with this.

Thanks for any help
 

brdgbldr

Well-known member
Joined
Jun 1, 2012
Messages
1,165
The code will clear automatically when the fault is fixed. You may have a bad engine coolant temperature sensor.
 
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