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.
|
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) |
Engine coolant temperature sensor signal |
||
|
Threshold |
The engine coolant temperature does not reach to specified temperature even though the engine has run long enough. |
||
|
Diagnosis delay time |
-- |
||