What is the code for mass air flow sensor Honda?

There isn’t a single Honda-specific code for the mass air flow (MAF) sensor. In practice, MAF-related faults on Hondas typically appear as generic OBD-II codes in the P0xxx range, most often P0100 through P0104, which cover the MAF circuit and signal issues.

What these codes mean for Honda MAF sensors

The mass air flow sensor measures the amount of air entering the engine so the computer can adjust fuel delivery. If the sensor signal is outside expected ranges or its circuit has a fault, the onboard computer stores a diagnostic trouble code. In Honda models, these are usually standard OBD-II codes, though some model years may also reference manufacturer-specific notes alongside the P0xxx codes.

Common MAF-related DTCs you may see

The most frequent MAF-related codes in Honda models fall into the P0100–P0104 family, reflecting circuit and signal issues.

• P0100 Mass or Volume Air Flow Circuit Malfunction


• P0101 Mass or Volume Air Flow Circuit Range/Performance


• P0102 Mass or Volume Air Flow Circuit Low Input


• P0103 Mass or Volume Air Flow Circuit High Input


• P0104 Mass or Volume Air Flow Circuit Intermittent

These codes indicate problems with the MAF signal or its circuitry, or intermittent connections. Common symptoms include rough idle, stalling, reduced fuel economy, and engine hesitation or misfires.

Other related codes and Honda-specific notes

Some Honda vehicles may also show related diagnostics tied to intake air conditions or fuel trim when the MAF signal is suspect. Examples include lean or rich condition codes such as P0171/P0174 and sensor-related codes for the intake air temperature circuit. In certain model years, Honda dealers may reference additional manufacturer-specific service codes alongside the standard P0xxx codes. Always consult your vehicle’s service information and use a scanner that decodes both generic and any applicable manufacturer-specific codes for your exact model and year.

How to diagnose and fix MAF issues in a Honda

A structured diagnostic approach helps determine whether the issue is the MAF sensor itself, an air leak, or related intake components.

• Inspect for vacuum leaks and cracked hoses around the intake, including clamps near the MAF.


• Check the air filter and intake path for obstructions, gaps, or damage.


• Inspect MAF wiring and connectors for corrosion, loose clips, or damaged wires; ensure proper grounding.


• Clean or replace the MAF sensor using a dedicated MAF cleaner (avoid touching the sensing elements with tools).


• Consider related sensors and fuel trims (check for P0171/P0174) to confirm whether the issue is lean/rich air charge conditions.


• If necessary, test with a known-good MAF sensor to confirm whether the fault follows the sensor or remains with the intake system.

Concluding paragraph: After performing diagnostic steps and any needed repairs, clear the codes and monitor driving cycles to confirm the issue is resolved and no new codes reappear.

Summary

For Honda vehicles, there isn’t a single exclusive MAF code. The typical codes related to the mass air flow sensor are in the P0100–P0104 range, indicating circuit or signal problems. Diagnosis focuses on the sensor, its wiring, intake leaks, and related sensors or fuel trims. Proper cleaning, replacement when necessary, and verifying repairs with a fresh scan are essential steps to restore performance and fuel economy.

How do you fix the engine code P0102?

To fix P0102, start by cleaning the Mass Air Flow (MAF) sensor with a specialized cleaner and inspecting the wiring and connectors for damage. If cleaning doesn't work, check for vacuum leaks in the air intake system and replace the air filter if it's clogged. If the issue persists, the MAF sensor may need to be replaced. Finally, clear the code with an OBD-II scanner and test drive the vehicle to confirm the fix. 
This video shows how to clean the MAF sensor and check for vacuum leaks: 59sHVAC Mechanic YouTube · Jun 28, 2024
Step 1: Inspect and clean the MAF sensor 

• Locate the MAF sensor, usually between the air filter and the throttle body. 
• Unplug the electrical connector and check for any corrosion or damage to the wires and connectors. 
• Remove the MAF sensor and clean the delicate wires inside with a specialized MAF sensor cleaner, spraying it perpendicular to the element. 
• Allow the sensor to dry completely before reinstalling it. 

Step 2: Check for air intake leaks 

• Inspect the air intake system, including the air filter and the ductwork between the MAF sensor and the engine, for cracks, holes, or loose connections.
• A clogged or dirty air filter can restrict airflow and should be replaced. 

This video explains how to check for air intake leaks: 57sBSK GarageYouTube · May 26, 2021
Step 3: Test the MAF sensor 

• After cleaning, a more advanced step is to test the sensor's voltage output using a multimeter to compare it to your vehicle's specifications. 

Step 4: Clear the code and test drive 

• Use an OBD-II scanner to clear the P0102 code. 
• Take the vehicle for a test drive to see if the code returns. 
• If the code does not come back, the issue is resolved. If it reappears, further diagnosis or replacement of the MAF sensor may be necessary. 

What is the code P0103?

The P0103 fault code indicates a high voltage reading from the Mass Air Flow (MAF) sensor, meaning the engine control module (ECM) is receiving a signal that is too high for the amount of air entering the engine. This is often caused by a dirty or failing MAF sensor, vacuum leaks, dirty air filter, or issues with the MAF sensor's wiring and connections. Symptoms include a lit "Check Engine" light, poor engine performance, and reduced fuel efficiency. 
This video explains what the P0103 code means and some causes: 36snondaYouTube · Feb 4, 2021
Causes

• Faulty MAF sensor: The sensor itself may be dirty or have failed. 
• Dirty air filter: A clogged air filter can restrict airflow and affect the MAF sensor's reading. 
• Vacuum leaks: Leaks in the intake system can cause unmetered air to enter the engine, confusing the MAF sensor. 
• Wiring or connection issues: Damaged, corroded, or loose wires and connectors to the MAF sensor can cause a high voltage signal. 
• Restricted exhaust: A clogged catalytic converter can sometimes lead to this code. 

Symptoms

• "Check Engine" light is illuminated: This is the most common and direct indicator. 
• Poor engine performance: This can include hesitation, rough idling, or stalling. 
• Reduced fuel efficiency: The incorrect air-fuel mixture can lead to higher fuel consumption. 
• Black smoke from the exhaust: Indicates the engine is running rich and burning excess fuel. 
• Limp mode: The vehicle may enter a restricted "limp mode" with limited speed and RPM. 

This video shows how to diagnose and fix the P0103 code: 36sHVAC Mechanic YouTube · May 9, 2023
Diagnosis and repair steps

1. Check the air filter: Inspect the air filter and replace it if it's dirty. 
2. Clean the MAF sensor: Carefully remove and clean the sensor with a dedicated MAF sensor cleaner spray. 
3. Inspect for vacuum leaks: Check all vacuum hoses and intake components for any leaks. 
4. Examine the MAF sensor wiring: Inspect the wiring harness and connectors for any damage, corrosion, or loose connections. 
5. Check for other codes: Use an OBD-II scanner to see if other related codes are present, which can help narrow down the issue. 
6. Replace the MAF sensor: If cleaning and inspecting other parts doesn't work, replacing the sensor is often the next step. 
7. Consider a professional diagnosis: If you are not comfortable performing these steps, it is best to take the vehicle to a qualified mechanic for professional diagnosis and repair. 

How serious is a P0101 code?

A fault in this circuit could severely alter the ratio of air and fuel, causing immediate performance issues. If left unchecked, it could damage other components of your vehicle. It's important to promptly diagnose the cause and find a repair solution for error code P0101.

What code will a mass air flow sensor cause?

A mass air flow (MAF) sensor can throw codes like P0101 (range/performance issue) or P0102 (circuit low). These codes are triggered when the engine control module (ECM) detects that the sensor's readings are inaccurate or out of range, which can result from a dirty or faulty sensor, wiring problems, or a vacuum leak.
 
This video explains how to troubleshoot MAF sensor issues: 36sHVAC Mechanic YouTube · May 7, 2023
Common MAF sensor codes

• P0101: "Mass Air Flow (MAF) Circuit Range/Performance." This code is set when the MAF sensor's signal is out of the expected range, which could be due to a dirty sensor, a bad sensor, or other issues like a vacuum leak. 
• P0102: "Mass Air Flow (MAF) Circuit Low." This code indicates that the MAF sensor is sending a signal that is too low. Potential causes include a dirty or faulty sensor, circuit problems, or issues with the powertrain control module (PCM). 
• P0171: "System Too Lean (Bank 1)." While not a direct MAF sensor code, a dirty MAF sensor can incorrectly report that less air is entering the engine. The PCM then reduces fuel, leading to a lean condition and this code. 

Symptoms of a MAF sensor issue

• Check engine light illumination
• Rough idle or stalling
• Poor engine performance, such as misfires or hesitation
• Hard starting
• Black smoke from the exhaust 

This video explains the causes and symptoms of MAF sensor issues: 59sTRQYouTube · Nov 13, 2024
Potential causes

• A dirty or contaminated MAF sensor
• A bad MAF sensor
• Problems with the MAF sensor's wiring or electrical connector
• A vacuum leak in the air intake system
• A dirty air filter