P0104: Mass or Volume Air Flow Circuit Intermittent
Can you still drive? You can drive, but be aware the engine may stall unexpectedly. Diagnose and repair as soon as possible.
What Does P0104 Mean?
Code P0104 indicates that the mass airflow sensor signal is fluctuating erratically or cutting in and out. This intermittent behavior suggests a loose connection, damaged wiring, or a sensor that is beginning to fail. The engine may run fine at times and poorly at others.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Loose or corroded MAF sensor connector
- Intermittent wiring break or chafed wire
- Failing MAF sensor
- Loose intake air duct clamps
Symptoms
- Check engine light on or flashing intermittently
- Intermittent stalling
- Surging or hesitation during driving
- Inconsistent idle speed
Diagnostic Steps
- 1Read and document freeze frame data
- 2Wiggle test the MAF sensor connector and wiring while monitoring live data
- 3Inspect wiring harness for chafing or breaks
- 4Check intake air ducts for loose clamps or cracks
- 5Clean the MAF sensor and reseat the connector
- 6Replace MAF sensor if the intermittent fault persists
Recommended Parts & Tools
electrical contact cleaner
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $30 - $400 |
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Chat with AI About P0104Commonly Affected Vehicles
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Frequently Asked Questions
Why does my car run fine sometimes with P0104?
P0104 is an intermittent code, meaning the MAF sensor connection cuts in and out. When the connection is good, the car runs normally; when it drops out, you experience stalling or poor performance.
How do I find an intermittent wiring problem?
Use a scan tool to monitor live MAF sensor data while gently wiggling the connector and wiring. A sudden change in readings will pinpoint the loose connection.
Community Fix Reports
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