← View Generic B0374 Guide Severity: Medium

🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

B0374: B0374: Immobilizer System 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

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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 B0374 Mean on 2021 Honda PASSPORT?

The immobilizer system, which prevents the engine from starting without the correct key, has malfunctioned. This code indicates a problem with the immobilizer system's communication with the vehicle's computer.

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Symptoms

• Engine won't start
• key fob won't work
• or alarm system won't disarm

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Common Causes

• Faulty immobilizer module
• bad key fob battery
• or incorrect key fob programming

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How to Fix B0374 on 2021 Honda PASSPORT

1. Check the key fob battery and replace it if necessary. 2. Check the immobilizer module for any signs of physical damage or corrosion. 3. If the problem persists, reprogram the key fob or replace the immobilizer module.

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Need Maintenance Info for Your PASSPORT?

Get oil capacity, filter specs, and torque settings for your specific 2021 Honda PASSPORT.

View 2021 Honda PASSPORT Specs

Parts for 2021 Honda PASSPORT

immobilizer module Shop ↗ key fob Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with B0374

B0372 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