E05 displayed and engine shuts down after several minutes of running, often under higher load.

Safety: Never open the radiator cap on a hot engine. Allow full cool‑down before opening the cooling system.

• Check coolant level: Inspect the expansion tank and radiator (when cool). Top up with the correct coolant mix if low. Look for leaks at hoses, water pump, and radiator.
• Inspect radiator and airflow: On JCB canopy sets, remove access panels and check the radiator fins for dust, seeds, or plastic debris. Clean with low‑pressure air or water from the back side out.
• Check fan and belt: Confirm the engine‑driven fan is intact and the belt has proper tension and no cracks. Replace worn belts and tension correctly.
• Thermostat and pump: If overheating persists, the thermostat may be stuck closed or the water pump impeller may be damaged. Feel the upper and lower radiator hoses during warm‑up; if one stays cold, suspect thermostat. Replacement usually requires draining coolant and removing the housing.
• Verify temperature sender: Check the coolant temperature sensor wiring to the JCB controller. A faulty sensor can falsely trigger E05; replace if readings are erratic.