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Home >> Suzuki >> 2002 >> XL-7 Plus >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0128: Coolant Thermostat Malfunction >> Condition
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DTC P0128: Coolant Thermostat Malfunction: Condition

DTC P0128 is set when engine coolant temperature is less than 167°F (75°C) after engine has run for a specified time. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles.