← View Generic P0174 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0174: System Too Lean Bank 2

on 2021 Honda PASSPORT

Fix Cost
$30 - $300
Parts & Labor
Difficulty
3/5
1-3 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 P0174 Mean on 2021 Honda PASSPORT?

The engine is running with too much air and not enough fuel on bank 2. Similar to P0171 but affects the second bank of cylinders.
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Symptoms

  • • Rough idle
  • • hesitation during acceleration
  • • lack of power
  • • backfiring
  • • hard starting
  • • check engine light.
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Common Causes

  • • Vacuum leaks on bank 2
  • • faulty mass airflow sensor
  • • clogged fuel injectors
  • • weak fuel pump
  • • intake manifold gasket leak.
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How to Fix P0174 on 2021 Honda PASSPORT

Find and repair vacuum leaks on bank 2, clean or replace mass airflow sensor, clean fuel injectors, test fuel pump pressure.

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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

MAF Sensor Shop ↗ Fuel Filter Shop ↗ Vacuum Hoses Shop ↗ Fuel Injector Cleaner 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 P0174

P0171 Same System

System Too Lean Bank 1

Medium
P0301 Related Problem

Cylinder 1 Misfire Detected

High
P0302 Related Problem

Cylinder 2 Misfire Detected

High
P0303 Related Problem

Cylinder 3 Misfire Detected

High
P0304 Related Problem

Cylinder 4 Misfire Detected

High
P0420 Related Problem

Catalyst System Efficiency Below Threshold 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