← View Generic B3945 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B3945: B3945: Climate Control Fan Motor Malfunction

on 2021 Honda PASSPORT

Fix Cost

$100 - $300

Parts & Labor

Difficulty

3/5

1-2 hours

DIY Possible?

❌ No

Pro recommended

Your Vehicle

2021 Honda

PASSPORT

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Important for 2021 Honda PASSPORT Owners

Before starting repairs, verify which engine your 2021 Honda PASSPORT has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does B3945 Mean on 2021 Honda PASSPORT?

The climate control fan motor is malfunctioning, causing the fan to not turn on or turn off properly.

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Symptoms

• Fan not blowing air
• uneven airflow
• or fan making unusual noises

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Common Causes

• Faulty fan motor
• faulty fan motor resistor
• or wiring issue

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How to Fix B3945 on 2021 Honda PASSPORT

1. Disconnect battery to prevent electrical shock. 2. Locate the fan motor resistor and check for any signs of damage or corrosion. 3. Replace the fan motor resistor if damaged. 4. Check the wiring harness for any signs of damage or corrosion. 5. Replace the wiring harness if damaged. 6. Reconnect the battery and test the fan.

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Parts for 2021 Honda PASSPORT

Fan motor resistor Shop ↗ Wiring harness Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B3945

B3943 Sequential Code

💡 Why These Codes Are Related:

• Similar Issues: Same root cause or component failure
• Related Problems: Often occur together due to system interactions
• Sequential Codes: Progressive failure stages or multiple sensors
• Same System: Components within the same automotive system