← View Generic P0377 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0377: P0377: Ignition System Misfire

on 2021 Honda PASSPORT

Fix Cost
$100 - $500
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
✅ Yes
Save money
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 P0377 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.
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Symptoms

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

  • • Faulty spark plugs
  • • ignition coils
  • • fuel injectors
  • • vacuum leaks
  • • faulty crankshaft or camshaft position sensors
  • • and worn piston rings
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How to Fix P0377 on 2021 Honda PASSPORT

1. Check and replace spark plugs, ignition coils, and fuel injectors. 2. Inspect and repair vacuum leaks. 3. Check and replace crankshaft or camshaft position sensors. 4. Check and replace piston rings if worn.

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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

spark plugs Shop ↗ ignition coils Shop ↗ fuel injectors Shop ↗ vacuum hoses Shop ↗ crankshaft position sensor Shop ↗ camshaft position sensor Shop ↗ piston rings 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 P0377

P0375 Sequential Code

P0375: Ignition System Misfire

Medium
P0376 Sequential Code

P0376: Ignition System Misfire

Medium
P0378 Sequential Code

P0378: Ignition System Misfire

Medium
P0379 Sequential Code

P0379: 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