← View Generic P0366 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0366: P0366: Ignition System Misfire

on 2021 Honda PASSPORT

Fix Cost
$200 - $800
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 P0366 Mean on 2021 Honda PASSPORT?

A misfire detected in one or more cylinders, affecting combustion efficiency, which can cause decreased engine performance, rough idling, and decreased fuel efficiency.
⚠️

Symptoms

  • • Rough idling
  • • decreased engine performance
  • • decreased fuel efficiency
  • • engine misfires
  • • decreased power
  • • and decreased acceleration.
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Common Causes

  • • Faulty spark plug
  • • ignition coil
  • • fuel injector
  • • or cylinder head
  • • worn or damaged piston rings
  • • low compression
  • • vacuum leaks
  • • or faulty oxygen sensor.
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How to Fix P0366 on 2021 Honda PASSPORT

1. Check and replace spark plugs, ignition coils, and fuel injectors if faulty. 2. Inspect and replace piston rings if worn or damaged. 3. Check and repair vacuum leaks. 4. Check and replace oxygen sensor if faulty.

🔧

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

spark plugs Shop ↗ ignition coils Shop ↗ fuel injectors Shop ↗ piston rings Shop ↗ oxygen sensor Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2021 Honda PASSPORT

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🔗

Related Diagnostic Codes

Other codes that may appear with P0366

P0364 Sequential Code

P0364: Ignition System Misfire

Medium
P0365 Sequential Code

P0365: Ignition System Misfire

Medium
P0367 Sequential Code

P0367: Ignition System Misfire

Medium
P0368 Sequential Code

P0368: Ignition System Misfire

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