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ENRUDEPLES

P0102 — Mass or Volume Air Flow Circuit Low Input

moderate

What it means

The control module has seen a MAF signal lower than the allowed minimum for a defined period. The engine then receives less fuel than it needs, which shows up as weak acceleration, stalling after start and rough running under load. In many cars the ECM switches to a substitute value and limits power.

Likely causes (most common first)

  1. Heavily contaminated MAF sensor element
  2. Open circuit or short to ground in the signal wire
  3. Loose, corroded or partly unplugged sensor connector
  4. Clogged air filter or collapsed intake duct restricting air flow
  5. Missing supply voltage or bad ground at the sensor
  6. Defective mass air flow sensor

Can you drive with it?

You can usually reach a workshop, but expect noticeably reduced power and possible stalling at idle.

This is the generic meaning. What about your car?

The same code has different typical culprits on different engines. Tell the AI your make, model and year — it will rank the causes for your exact car and give you a check order.

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