← View Generic P0177 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0177: P0177: Fuel Trim Malfunction (Bank 1)

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
⚠️

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 P0177 Mean on 2021 Honda PASSPORT?

The engine computer has detected a malfunction in the fuel trim system, which regulates fuel delivery to the engine. This code indicates that the fuel mixture is too lean, meaning there is too much air and not enough fuel.
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Symptoms

  • • Poor engine performance
  • • rough idle
  • • decreased power
  • • decreased fuel efficiency
  • • and a possible check engine light
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Common Causes

  • • Faulty oxygen sensor
  • • clogged fuel filter
  • • vacuum leaks
  • • faulty fuel injectors
  • • or a malfunctioning fuel pressure regulator
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How to Fix P0177 on 2021 Honda PASSPORT

1. Check and replace the oxygen sensor if necessary. 2. Inspect and clean the fuel filter. 3. Check for vacuum leaks and repair if necessary. 4. Inspect and clean the fuel injectors. 5. Check the fuel pressure regulator 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

oxygen sensor Shop ↗ fuel filter Shop ↗ fuel injectors Shop ↗ fuel pressure regulator 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 P0177

P0175 Sequential Code

System Too Rich Bank 2

Medium
P0176 Sequential Code

P0176: Fuel Trim Malfunction (Bank 1)

Medium
P0178 Sequential Code

P0178: Fuel Trim Malfunction (Bank 1)

Medium
P0179 Sequential Code

P0179: Fuel Trim Malfunction (Bank 1)

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