Hybrid/EV Electronics Cooling System Performance

Check these first

• A hybrid electronics cooling loop that runs hotter than expected
• Low or air bound coolant in the electronics loop
• A weak electronics coolant pump
• A restricted electronics radiator or hose

What to do next

1. Read hybrid electronics cooling temperature on a scan tool
2. Check coolant level and bleed the electronics loop
3. Watch coolant pump speed and flow
4. Inspect the electronics radiator and hoses for restriction
5. Replace the weak electronics coolant pump if temperatures stay high
6. Clear the code and retest

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