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Engine Controls - MIL ON/DTC P0128 Set

XL7

Section Title: Engine
TSB No. TS 24 02118

Division: Automotive
Category: Technical

SUBJECT:
CHECK ENGINE LIGHT "ON", DTC P0128 (ENGINE COOLANT TEMPERATURE (ECT) BELOW THERMOSTAT REGULATING TEMPERATURE) -OUTSIDE TEMPERATURES BELOW FREEZING

MODEL(S):
XL7 (JC636)

YEAR:
2007~2008

CONDITION:
Check engine light is ON with DTC P0128 (Engine coolant temperature (ECT)
below thermostat regulating temperature) stored.

CAUSE:
Mis-calibration for vehicles with rear HVAC. Heat up time exceeded due to extra coolant capacity of rear HVAC equipped vehicles.

CORRECTION:
DO NOT REPLACE THE ENGINE CONTROL MODULE (ECM) OR THERMOSTAT! Please follow the service manual procedure to reprogram the ECM with the latest software. Be sure to click "Clear DTC's" after programming finishes. See below.





PART(S) INFORMATION:





REQUIRED TOOLS AND SOFTWARE:





WARRANTY CLAIM INFORMATION:





NOTE:
The tire pressure monitoring system (TPMS) may not show tire pressures after programming. This is normal, the vehicle will have to be driven for the sensors to wake up and update the information.





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