← View Generic P0397 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0397: P0397: 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 P0397 Mean on 2021 Honda PASSPORT?

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

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

  • • Faulty spark plugs
  • • ignition coil
  • • spark plug wires
  • • fuel injector
  • • or faulty engine compression.
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How to Fix P0397 on 2021 Honda PASSPORT

1. Check and replace spark plugs if necessary. 2. Check and replace ignition coil if necessary. 3. Check and replace spark plug wires if necessary. 4. Check and clean fuel injectors if necessary. 5. Check engine compression and replace if necessary.

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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 coil Shop ↗ spark plug wires Shop ↗ fuel injectors 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 P0397

P0395 Sequential Code

P0395: Ignition System Misfire

Medium
P0396 Sequential Code

P0396: Ignition System Misfire

Medium
P0398 Sequential Code

P0398: Ignition System Misfire

Medium
P0399 Sequential Code

P0399: 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