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coolant temp oscillation

mikus

Well-known member
Joined
Jan 11, 2007
Messages
2,763
Location
Aurora IL
I just threw a DTC0021 on lunch - hooked up link and instead of seeing -40 the number is bouncing all over the place randomly, mainly between 100-200º.

sensor?
 

turbofonz

Well-known member
Joined
Sep 27, 2006
Messages
475
Location
Granby, MA
Good chance it's the wiring to the sensor also. Lower thermostat housing, 2 wire sensor. See if they're brittle and dry. Repair if needed... if not, toss a sensor at it, it's cheap enough.
 
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