Question 1

What does P0100 mean?

Accepted Answer

P0100 - Mass Air Flow (MAF) Circuit Malfunction. The MAF sensor signal is outside the expected range. The PCM can't measure incoming air properly.

Question 2

What are the symptoms of P0100?

Accepted Answer

Check engine light, Poor acceleration, Rough idle, Black smoke, Stalling, Hard starting

Question 3

What causes P0100?

Accepted Answer

Dirty MAF sensor (most common), Failed MAF sensor, Air filter housing not sealed, Intake air leak after MAF, Wiring issue, Aftermarket intake installed wrong

Question 4

How much does it cost to fix P0100?

Accepted Answer

Typical repair cost: $20-$350. Try cleaning with MAF sensor cleaner spray ($8) before buying a new sensor ($100-300). Fixes the problem about 50% of the time. Never touch the element with fingers.

P0100 — Mass Air Flow (MAF) Circuit Malfunction

Don't guess — diagnose P0100 the right way

Common symptoms of P0100

Common causes of P0100

Repair cost & difficulty

Vehicles commonly affected

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