What this code means

The primary motor/generator has exceeded its maximum operating temperature. Power output is being reduced to protect the motor.

Symptoms

• Reduced power warning
• Significant acceleration reduction
• Motor whine may change pitch
• Turtle mode or limp home
• Climate control may shut off to reduce load
• Regenerative braking reduced

Common causes

• Extended high-power driving
• Cooling system malfunction
• Ambient temperature extremely high
• Towing or climbing grades
• Coolant flow restriction to motor

Diagnostic steps

1. Read motor temperature and compare to spec
2. Check motor cooling circuit flow
3. Inspect coolant level in motor circuit
4. Verify cooling fan operation
5. Review driving conditions that triggered code

Repair notes

Allow motor to cool before resuming normal driving. Inspect motor cooling system. Replace coolant pump if flow is inadequate.

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