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Home >> Suzuki >> 2001 >> XL-7 Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0128: Coolant Thermostat Malfunction >> Condition

DTC P0128: Coolant Thermostat Malfunction: Condition

WARNING: This page is about a different car, the 2003 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.

DTC is set when engine coolant temperature is too low, less than 176°F (80°C), or too high 212°F (100°C) after engine has run for a specified time. Engine coolant temperature circuit is monitored once per drive cycle. MIL is illuminated when Engine Control Module (ECM) detects malfunction during 2 consecutive drive cycles. Possible causes are:

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