AutoCodes – Honda – P0102 Honda

P0102 Honda Code - Mass Air Flow Sensor Circuit Low Voltage

Quick Answer

The Mass Air Flow (MAF) sensor is placed in the stream of the intake air. Common causes include Dirty Air Filter, Dirty Mass Air Flow (MAF) Sensor, Intake air leaks. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0102 Honda indicates Mass Air Flow Sensor Circuit Low Voltage.
Common causes: Common causes include Dirty Air Filter, Dirty Mass Air Flow (MAF) Sensor, Intake air leaks.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 58,576

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 18, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0102 Honda Description

The Mass Air Flow (MAF) sensor is placed in the stream of the intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM). The ECM controls the temperature of the hot film by a certain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the MAF Sensor Signal is less than the factory specifications.

OBDII Code P0102 Honda - Mass Air Flow Sensor Circuit Low Voltage - AutoCodes.com — P0102 Honda Code - Mass Air Flow Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0102 Honda?

Dirty Air Filter
Dirty Mass Air Flow (MAF) Sensor
Intake air leaks
Faulty Mass Air Flow Sensor
Mass Air Flow Sensor harness is open or shorted
Mass Air Flow Sensor circuit poor electrical connection

How to Fix the DTC P0102 Honda?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

Before replacing the Mass Air Flow (MAF) Sensor, try replacing the air filter and cleaning the Mass Air Flow Sensor with low compress air or Mass Air Flow Sensor Cleaner. Reset code and drive vehicle. If the code comes back, you must replace the Mass Air Flow Sensor to fix the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0102 Honda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0102 Honda code?

Need more information on how to fix the P0102 Honda code? Get Access to Factory Service Manuals

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Information for Specific Honda Models

P0102 2008 Honda Accord — Mass Air Flow Sensor Circuit Low Voltage
P0102 2009 Honda Accord — Mass Air Flow Sensor Circuit Low Voltage
P0102 2010 Honda Accord — Mass Air Flow Sensor Circuit Low Voltage

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0102 Honda Code

1. What does the OBDII code P0102 mean for a Honda?

Code P0102 indicates a "Mass Air Flow (MAF) Sensor Circuit Low Voltage," meaning the MAF sensor is sending a signal to the engine control module (ECM) that is below the expected range.

2. What are the common symptoms of a P0102 code on a Honda?

Symptoms may include reduced engine power, rough idle, poor acceleration, decreased fuel efficiency, or the check engine light turning on.

3. What causes the P0102 code to appear on a Honda?

Common causes include a dirty or faulty MAF sensor, a vacuum or air intake leak, damaged wiring or connectors, or a clogged air filter.

4. Can a dirty air filter trigger the P0102 code on a Honda?

Yes, a clogged or dirty air filter can restrict airflow, potentially causing the MAF sensor to detect low voltage and trigger the P0102 code.

5. How can I fix the P0102 code on my Honda?

You can start by cleaning the MAF sensor, inspecting the air intake system for leaks, replacing the air filter if dirty, and checking the wiring and connectors for damage.

6. Can I drive my Honda with a P0102 code?

While it may be possible to drive with this code, it can lead to poor engine performance and potential long-term damage if not addressed promptly.

7. How do I clean the MAF sensor to fix a P0102 code on a Honda?

Remove the MAF sensor carefully, spray it with MAF sensor cleaner (never use other cleaners), let it dry, and reinstall it. Be cautious not to damage the delicate sensor components.

8. Can a vacuum leak cause the P0102 code on a Honda?

Yes, a vacuum or air intake leak can disrupt airflow readings, leading to a low voltage signal from the MAF sensor and triggering the P0102 code.

9. Does a faulty MAF sensor always cause the P0102 code on a Honda?

Not always. Other issues like wiring problems, air intake leaks, or a dirty air filter can also trigger the code, so proper diagnosis is essential.

10. How much does it cost to fix a P0102 code on a Honda?

Costs vary depending on the issue. Cleaning the MAF sensor or replacing an air filter is inexpensive, while replacing the MAF sensor or repairing wiring can cost $100-$300 or more.