P0104 OBD II Trouble Code Mass Air Flow (MAF) Circuit Intermittent/Erratic

How to quickly diagnose, repair, and info on symptoms and causes of a P0104 MAF mass airflow code which indicates an intermittent problem in the MAF circuit.

Symptoms of P0104 OBD II Trouble Code

  • Malfunction indicator lamp (MIL) illumination (a.k.a. check engine light)
  • Rough running engine
  • Black smoke from tail pipe
  • Stalling
  • Engine hard start or stalling after it starts
  • Possible other driveability symptoms or even no symptoms

Common Causes of P0104 OBD II Trouble Code

  • Dirty or contaminated mass air flow sensor
  • Failed MAF sensor
  • Intake air leaks
  • MAF sensor electrical harness or wiring problem (open, shorted, frayed, poor connection, etc.)