DTC code
P0104
Mass or Volume Air Flow Sensor A Circuit Intermittent
Technical guide
Symptoms
- Check Engine Light
- Lower fuel economy
- Black smoke from the tailpipe
- Rough operation
- Stalling
- Hard Start
Probable causes
- Dirty or damaged air filter
- Leaking vacuum hoses or intake gaskets
- Debris covering MAF sensing element
- Faulty MAF
- Faulty electrical connection to MAF sensor
- Corroded/Damaged MAF circuit terminals
Diagnostic steps
- Check your air filter and replace if needed.
- Visually inspect wiring around Mass Air Flow (MAF) Sensor for any frayed, broken, corroded wires.
- Check vacuum lines by spraying water over intake area to identify leaks.
- Clean your MAF sensor to make sure that there are no pieces in the system.
- Test the MAF sensor by disconnecting its electrical harness while the engine runs — if the engine shuts off, the sensor operates normally; if not, replacement is needed.
Cross-checked technical synthesis (QA). It does not replace the manufacturer's procedure.
AI here is a librarian: this page shows only what mechanics confirmed, or says “unknown”. It never suggests a diagnosis — MECCANIC interprets the code, never your car.
0 confirmed cases on P0104
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