exhaust temp sensor problem

[mattymac]

Got a buddy who picked up a used 09 800 rmk, 1900 miles on it and was flashing the code for exhaust temp sensor, bought a brand new sensor plugged it in and still flashing the code?? Checked continuity between the plug ends and the ecm pins, perfect! Im not super familiar with this generation of polaris, tried researching it but it seems like the sleds that have a sensor code flash, a new sensor fixes the issue??? any help would be appreciated!

 

[cascadesnowjunky]

How long did he run it after replacement. Sometimes it take severa minutes before the check engine light and code will go away.

 

[retiredpop]

Just looked at the conditions to set the exhaust temperature blink code and it mentions running above 3000 rpm for at least 2 minutes to set the code. Maybe it takes the same conditions to reset the code as mentioned above.

 

[mattymac]

the backstory:

He bought it used with 1900 miles and it had the flashing code, sled went 20-30 miles and shattered a piston. I put in a new TM3 long rod motor from indy dan. Got it all together with a new sensor, after a few heat cycles it was still flashing the code and thats where were at now with it. I may not have had it over that many rpms for that long and really not much load on it to make much pipe temp, just trying to get it ready for when the snow flies, and I thought that what I have already done would have been enough to clear the code.

 

[kiliki]

this is for the cat but might help, we have seen the wire inside the connector on the harness side brake but not open up the insulation. grab it and the ohm meter shows good but add vibrations and its just enough to keep it flashing. ended up cutting off the factory connector and adding new crimp style connectors and fixed.