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Home >> Nissan-Datsun >> 2017 >> Maxima SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 4) >> DTC/Circuit Diagnosis >> DTC P0128: Thermostat Function >> DTC Description >> DTC Detection Logic

DTC Detection Logic

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 being stuck open.

The engine coolant temperature does not reach to specified temperature even though the engine has run long enough.

DTC CONSULT screen terms
(Trouble diagnosis content)		 DTC detection condition
P0128 THERMSTAT FNCTN
[Coolant thermostat (coolant temperature below thermostat regulating temperature)]		 Diagnosis condition -
Signal (terminal) -
Threshold The engine coolant temperature does not reach to specified temperature even though the engine has run long enough
Diagnosis delay time -
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