P0102 on a Toyota: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

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

What P0102 means on a Toyota

On a Toyota, P0102 means the mass air flow sensor signal is lower than the engine computer expects. The MAF sensor on most Toyotas is a hot-wire sensor that measures incoming air so the computer can set the fuel mixture. A weak signal usually means the sensor is dirty, failing, or not getting full power.

Is P0102 common on Toyotas?

P0102 is common on Toyotas with higher mileage, especially Camrys, Corollas, and RAV4s. A dirty air filter lets the MAF sensor get coated with dust and oil, which makes its signal drop. The sensor itself also fails with age, and the code is often fixed by cleaning or replacing it.

Commonly reported on: Camry, Corolla, RAV4, Highlander.

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: Clogged or dirty air filter
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