AutoCodes – Mazda – P0104 Mazda

P0104 Mazda Code - Mass Or Volume Air Flow Circuit Intermittent

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: P0104 Mazda indicates Mass Or Volume Air Flow Circuit Intermittent.
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 4,826

How popular is this code, among other codes? Low

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 19, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0104 Mazda 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 an MAF Sensor signal that is outside the calibrated level.

OBDII Code P0104 Mazda - Mass Or Volume Air Flow Circuit Intermittent - AutoCodes.com — P0104 Mazda Code - Mass Or Volume Air Flow Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0104 Mazda?

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 P0104 Mazda?

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.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0104 Mazda 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.

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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 P0104 Mazda Code

1. What are the common symptoms associated with OBDII code P0104 in a Mazda?

- Common symptoms include rough idling, poor acceleration, stalling, decreased fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P0104 on a Mazda indicate?

- OBDII code P0104 indicates an intermittent issue in the Mass or Volume Air Flow Circuit.

3. What are the possible causes of OBDII code P0104 in a Mazda?

- Possible causes include a faulty mass air flow sensor, damaged wiring or connectors in the circuit, a vacuum leak, or a clogged air filter.

4. How can I diagnose the cause of OBDII code P0104 in my Mazda?

- You can start by visually inspecting the mass air flow sensor, checking the wiring and connectors for damage, and ensuring there are no vacuum leaks. Using a multimeter to test the sensor's voltage output can also help diagnose the issue.

5. Can a dirty air filter trigger OBDII code P0104 in a Mazda?

- Yes, a dirty or clogged air filter can disrupt the airflow entering the engine, causing irregular readings from the mass air flow sensor and potentially triggering code P0104.

6. Is it safe to continue driving my Mazda with OBDII code P0104 present?

- It is not recommended to drive your Mazda with code P0104 present, as it can lead to poor engine performance, reduced fuel efficiency, and potential damage to other engine components.

7. How can I repair OBDII code P0104 in my Mazda?

- Repair options may include cleaning or replacing the mass air flow sensor, repairing damaged wiring or connectors, fixing any vacuum leaks, and replacing the air filter if necessary.

8. Can resetting the check engine light make OBDII code P0104 disappear permanently?

- Resetting the check engine light may temporarily clear the code, but if the underlying issue causing P0104 is not addressed, the code is likely to reappear.

9. Will OBDII code P0104 cause my Mazda to fail an emissions test?

- Yes, OBDII code P0104 can cause your Mazda to fail an emissions test due to the impact it has on engine performance and emissions control systems.

10. How much does it typically cost to repair OBDII code P0104 in a Mazda?

- The cost of repairing OBDII code P0104 can vary depending on the specific cause of the issue, but it may range from $100 to $500, including parts and labor.