← View Generic P0104 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2021 Honda PASSPORT

P0104: P0104: Mass Airflow Sensor (MAF) Circuit Low Input

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 P0104 Mean on 2021 Honda PASSPORT?

The mass airflow sensor (MAF) is not sending a signal to the engine control module (ECM) due to a low airflow reading, which can cause poor engine performance, rough idle, and decreased fuel efficiency.
⚠️

Symptoms

  • • Poor engine performance
  • • rough idle
  • • decreased fuel efficiency
  • • check engine light on
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Common Causes

  • • Faulty mass airflow sensor
  • • dirty or clogged air filter
  • • vacuum leaks
  • • faulty engine control module
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How to Fix P0104 on 2021 Honda PASSPORT

1. Check and clean the air filter. 2. Check for vacuum leaks. 3. Replace the mass airflow sensor if faulty.

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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

Mass Airflow Sensor Shop ↗

Essential Tool

Must Have

OBD2 Scanner

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Related Diagnostic Codes

Other codes that may appear with P0104

P0100 Same System

P0100: Mass Airflow Sensor (MAF) Circuit Malfunction

Medium
P0101 Same System

Mass Air Flow Sensor Circuit Range/Performance Problem

Medium
P0102 Same System

Mass Air Flow Sensor Circuit Low Input

Medium
P0103 Same System

Mass Air Flow Sensor Circuit High Input

Medium
P0171 Related Problem

System Too Lean Bank 1

Medium
P0174 Related Problem

System Too Lean Bank 2

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