← View Generic B1821 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B1821: B1821: Turn Signal Lamp Malfunction

on 2021 Honda PASSPORT

Fix Cost

$50 - $200

Parts & Labor

Difficulty

3/5

1-2 hours

DIY Possible?

✅ Yes

Save money

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 B1821 Mean on 2021 Honda PASSPORT?

The B1821 code indicates a malfunction in the turn signal lamp circuit, which can cause the turn signals to malfunction or not function at all.

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Symptoms

• Turn signals not working
• flashing
• or staying on continuously
• warning lights on dashboard

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Common Causes

• Faulty turn signal switch
• corroded or damaged wiring
• blown fuse
• or malfunctioning turn signal lamp

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How to Fix B1821 on 2021 Honda PASSPORT

1. Check and replace the turn signal switch if faulty. 2. Inspect and clean or replace corroded wiring. 3. Check and replace the fuse if blown. 4. Replace the turn signal lamp if malfunctioning.

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Need Maintenance Info for Your PASSPORT?

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Parts for 2021 Honda PASSPORT

Turn signal switch Shop ↗ Wiring harness Shop ↗ Fuse Shop ↗ Turn signal lamp Shop ↗

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Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B1821

B1819 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