P0104 — Mass or Volume Air Flow Circuit Intermittent
The ECU detects intermittent signal dropouts or noise on the mass air flow (MAF) sensor circuit. The fault is not constantly present, suggesting a loose connection, intermittent wiring break, or a failing sensor under specific conditions (vibration, temperature).
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Mass air flow sensor
- Maf connector
- Maf wiring
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- MAF connector loose or corroded
- Wiring chafed against engine components
- MAF sensor failing intermittently
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.