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Home >> Chevrolet >> 2012 >> Cruze LS, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 187 (Engine Cooling System) >> Diagnostic Information and Procedures >> DTC P00B7 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2011 Chevrolet Cruze. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, inspect the cooling system for the following conditions:
    • Weak coolant solution
    • Obstructed radiator air flow or bent radiator fins
    • Blocked cooling system passages
    • Radiator hoses that are restricted, collapsed, or deteriorated
    • Damaged water pump
    • Loss of cooling system pressure
    • Leaking surge tank cap
    • Leaking radiator hoses
    • Cylinder head or an engine block that is cracked or plugged
  2. If you find any of the above conditions, repair as necessary.
  3. If all conditions test normal, replace the E41 Engine Coolant Thermostat Heater.