← View Generic B3971 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B3971: B3971: Power Window Regulator Malfunction

on 2021 Honda PASSPORT

Fix Cost

$150 - $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 B3971 Mean on 2021 Honda PASSPORT?

The power window regulator is malfunctioning, preventing the window from moving properly.

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Symptoms

• Window won't move
• stuck in position
• or moves erratically

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Common Causes

• Faulty power window regulator
• damaged window track
• or faulty window switch

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How to Fix B3971 on 2021 Honda PASSPORT

1. Disconnect battery to prevent electrical shock. 2. Remove door panel to access window regulator. 3. Disconnect regulator electrical connector. 4. Remove regulator mounting screws. 5. Remove regulator and inspect for damage. 6. Replace regulator if damaged. 7. Reassemble in reverse order.

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Parts for 2021 Honda PASSPORT

Power window regulator Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B3971

B3969 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