← View Generic B0451 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B0451: B0451: 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
⚠️

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 B0451 Mean on 2021 Honda PASSPORT?

The B0451 code indicates a problem with the window regulator, which controls the movement of the window up and down. This code is often triggered by a faulty regulator motor, faulty regulator gears, or a faulty window switch.
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Symptoms

  • • Window stuck or slow to move
  • • unusual noise when rolling up or down
  • • window may not roll up or down at all
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Common Causes

  • • Faulty window regulator motor
  • • faulty regulator gears
  • • faulty window switch
  • • damaged or worn-out window regulator tracks
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How to Fix B0451 on 2021 Honda PASSPORT

1. Disconnect the battery to prevent any accidental window movement. 2. Remove the door panel and disconnect the window regulator electrical connector. 3. Inspect the regulator motor and gears for any signs of wear or damage. 4. Replace the faulty regulator motor or gears if necessary. 5. Reassemble the window regulator and reconnect the electrical connector. 6. Test the window to ensure proper function.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Window regulator motor Shop ↗ Regulator gears Shop ↗ Window regulator tracks Shop ↗

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Related Diagnostic Codes

Other codes that may appear with B0451

B0449 Sequential Code

B0449: Climate Control Actuator Malfunction

Medium
B0450 Sequential Code

B0450: Door Locks Malfunction

Medium
B0452 Sequential Code

B0452: Seat Adjuster Switch Circuit Malfunction

Medium
B0453 Sequential Code

B0453: Body System Code for Malfunctioning Headlight or Taillight

Medium

💡 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