← View Generic B0603 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B0603: B0603: Power Window Circuit Malfunction

on 2021 Honda PASSPORT

Fix Cost
$50 - $200
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 B0603 Mean on 2021 Honda PASSPORT?

The B0603 code indicates a problem with the power window circuit, which prevents the windows from functioning properly. This could be due to a faulty window switch, wiring issue, or a problem with the window regulator.
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Symptoms

  • • Window won't roll up or down
  • • or does so intermittently
  • • may have a slow or stuck movement.
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Common Causes

  • • Faulty window switch
  • • wiring issue
  • • window regulator malfunction
  • • or a problem with the window motor.
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How to Fix B0603 on 2021 Honda PASSPORT

1. Check the window switch for any signs of wear or damage. Clean or replace it if necessary. 2. Inspect the wiring harness for any signs of damage or corrosion. Repair or replace it if necessary. 3. Check the window regulator for any signs of wear or damage. Clean or replace it if necessary. 4. If the issue persists, check the window motor for any signs of malfunction. Replace it if necessary.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Power window switch Shop ↗ Wiring harness Shop ↗ Window regulator Shop ↗ Window motor Shop ↗

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OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B0603

B0601 Sequential Code

B0601: Climate Control Actuator Malfunction

Medium
B0602 Sequential Code

B0602: Door Locks Malfunction

Medium
B0604 Sequential Code

B0604: Seat Switch Circuit Malfunction

Medium
B0605 Sequential Code

B0605: Body System Code - Lighting Malfunction

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