B1201HVAC

Blower Motor Circuit Fault

B1201 indicates a fault in the HVAC blower motor circuit. The climate module sees an open, short, or out-of-range condition in the blower or its speed control.

🚗 Yes, this affects cabin airflow, not vehicle safety.
LOW
severity
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🎯 Top Causes, Ranked by Likelihood

#1Failed blower motor$80-$300
35%
The blower motor wears out and stops drawing correct current.
#2Faulty blower resistor or control module$30-$200
30%
The speed-control resistor or module fails.
#3Wiring or connector fault$50-$250
25%
A burned connector or broken wire opens the circuit.

🩺 Common Symptoms

💰 Repair Cost: DIY vs Shop

DIY Cost
$30-$300
Shop Cost
$100-$400

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose B1201

1Test the blower motor for operation on all speeds
2Inspect the blower resistor and its connector for heat damage
3Check wiring and fuses to the blower
4Replace the resistor, motor, or connector as needed

❓ Frequently Asked Questions

Can I drive with B1201?
Yes, it only affects your cabin airflow and comfort.
Why does my fan only work on high with B1201?
A failed blower resistor commonly leaves only the highest speed working.
What causes B1201?
A worn blower motor, a bad resistor, or a burned connector.

🔗 Related Codes

B1200B1250B1213B1000
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