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P0128 2002 Nissan Sentra

P0128 2002 Nissan Sentra - Thermostat Function

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P0128 2002 Nissan Sentra Comments |  Add Comment
Possible causes
- Leaking or stuck open thermostat
- Low engine coolant level
- Insufficient warm up time
- Faulty engine coolant temperature sensor
- Engine coolant temperature sensor harness is open or shorted
- Engine coolant temperature sensor circuit poor electrical connection
Help with Possible causes What does this mean?
Tech notes
If cooling system is not leaking and the fluid level is OK, replacing the thermostat usually takes care of the problem.
Help with Tech Notes What does this mean?
When is the code detected?
The engine coolant temperature does not reach to specified temperature even though the engine has run long enough.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0128 2002 Nissan Sentra Description

Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long enough. This is due to a leak in the seal or the thermostat open stuck.

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