The 4.2 or the 5.3 engine?
located coolant temp sensor
The coolant temperature sensor, on a 2005 Chevrolet trailblazer 4.2 liter engine, is located just above the thermostat housing. The thermostat housing is located in the front of the engine.
If the wiring and connections at the coolant temp sending unit check okay start with replacing the coolant temp sending unit. Temp sending unit should be less than $20.
Where is the coolant temperature sending unit in a 96 toyota tacoma 3.4L V6
Trouble code P0128 means:Coolant thermostat (coolant temp below thermostat regulating temp)
intake manifold
Trouble code P0128 means:Coolant thermostat (coolant temp below thermostat regulating temp)
where is the temperture sensor located on a 2002 chevy trailblazer with a 4200 motor
Temperature Gauge Sending Unit The sending unit is located in the front section of the intake manifold in the vicinity of the thermostat.
coolant temp sensor,does just what it says,it relays your coolant temp to gauges!
There is a temp sensor on the water inlet for the PCM, and sending units for the gauge on the side of the heads. Normally part stores don't carry the sending units.
Low on coolant, sticky thermostat, loose connections, faulty sending unit.