P0128 thermostat function
DTC Description
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 No.
CONSULT screen terms
(Trouble diagnosis content)
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Wiring diagram
AWD SYSTEM
Wiring Diagram
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ECU diagnosis information
EPS CONTROL UNIT
Reference Value
VALUES ON THE DIAGNOSIS TOOL
CAUTION:
The output signal indicates the EPS control unit calculation data. The normal
values will be displayed
even in the event that the output circuit (harness) is open.
NOTE:
The following table includes information (items) ...