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Home >> Subaru >> 2006 >> Baja Turbo, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Diagnostic Trouble Code (DTC) Detecting Criteria (H4SO)) >> Diagnostic Trouble Code (DTC) Detecting Criteria >> DTC P0128 - Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) - >> Diagnostic Method

Diagnostic Method

WARNING: This page is about a different variant/trim than selected.

Judge NG when the estimated engine coolant temperature comes to 75°C (167°F) before the engine coolant temperature becomes 75°C (167°F) and the difference between them becomes more than 30°C (86°F). Judge OK when the engine coolant temperature comes to 75°C (167°F) before judging NG.

Time Needed for Diagnosis  : 30 seconds

Malfunction Indicator Light Illumination  : Illuminates when malfunction occurs in 2 continuous driving cycles.