P0128

DTC P0128 COOLANT THERMOSTAT (ENGINE COOLANT TEMPERATURE BELOW THERMOSTAT REGULATING TEMPERATURE)

DTC DETECTING CONDITION:
- Detected when two consecutive driving cycles with fault occur.
- GENERAL DESCRIPTION.

TROUBLE SYMPTOM:
Thermostat remains open.

CAUTION: After repair or replacement of faulty parts, perform Clear Memory Mode Clear Memory Mode and Inspection Mode Preparation For the Inspection Mode - Using a Scan Tool

Step 1-2: