P0102 — Mass Air Flow (MAF) Circuit Low Input

P0102 means your MAF sensor is reporting an unusually low airflow signal. The fix is usually as simple as cleaning the sensor with MAF-specific cleaner.

Cost range: $10–$400. Severity: medium. Safe to drive? Yes, but expect rough idle and reduced MPG.

Most common causes of P0102

1. Dirty MAF sensor — Clean with $8 MAF cleaner — fixes most cases in 5 min. ($10–$25)
2. Faulty MAF sensor — Replace if cleaning doesn't help. ($100–$400)
3. Damaged intake duct — Cracked airbox tube allows unmetered air in. ($50–$200)
4. Loose air filter housing — Reseat the filter cover. ($0)

Symptoms drivers report with P0102

• Rough idle
• Hesitation
• Reduced power