What this code means

Malfunction in the electronic blower motor speed control module (replaces traditional resistor on newer vehicles).

Symptoms

• Blower speed erratic
• No blower motor operation
• Blower runs at full speed only
• Control module overheating

Common causes

• Faulty blower motor control module
• Power transistor failure
• Poor ground connection
• Blower motor drawing excessive current

Diagnostic steps

1. Test control module power and ground
2. Measure blower motor current draw
3. Check control signal from HVAC module
4. Test control module output
5. Inspect connector

Repair notes

Replace blower motor control module. Check blower motor current draw to prevent repeat failure.

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