P0102 on a Hyundai: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

You can usually drive a Hyundai with P0102, but the engine may idle rough or use more fuel until the sensor is fixed.

What P0102 means on a Hyundai

On a Hyundai, P0102 means the mass air flow sensor signal is too low. The MAF sensor measures incoming air so the engine computer can add the right amount of fuel. A weak signal usually means the sensor is dirty or failing, or the intake has a problem.

Is P0102 common on Hyundais?

P0102 shows up on Hyundais with higher mileage, especially Elantras, Sonatas, and Tucsons. Dust and oil coat the MAF sensing element over time, especially with a dirty air filter. Cleaning the sensor is cheap and often fixes the code.

Commonly reported on: Elantra, Sonata, Tucson, Santa Fe.

Symptoms

Check engine light on
Rough idle or hesitation
Stalling at stops
Worse fuel economy

Common causes

most common: Dirty or contaminated MAF sensor
common: Faulty MAF sensor
common: Dirty air filter or intake restriction
less common: Wiring or connector problem

How to fix it

Fix	DIY?	Typical cost
Clean the MAF sensor with MAF cleaner	Yes	$10–15
Replace the air filter	Yes	$15–40
Replace the MAF sensor	Yes	$80–250
Repair the wiring or connector	Mechanic	$80–200