Mass Air Flow Sensor problem

BHASELTINE

MEMBER
TOYOTA COROLLA

I have a 2003 Toyota Corolla with 40,000 mi and a 4cly engine. My check engine light came on and I had a mechanic look at it, he said he couldn't figure out what was wrong, but the code was reading that the Mass Air Sensor was having problems, I replaced it with a new one then when I tried to start the car it would'nt crank. If I unplug the sensor I can start the car and it will run well up to 3000 rpm. If I have the car running with the sensor unplugged and then plug it in while running the car shuts off. The check engine light has stayed on the whole time. I took it to a toyota dealership and they said it would cost hundreds for them to run the diagnostics to figure out what is wrong. Any thoughts? It seems like an electrical or computer problem? What do you think?

2 Replies

MERLIN2021

MECHANIC
17,250 POSTS

I think you bought an aftermarket MAF that's no good, get a toyota part.

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Monday, October 22nd, 2007 AT 4:50 PM

LOSTINMARS

MECHANIC
222 POSTS

Took the words right out of my mouth.

When it comes to engine sensors oem is the only way to go. This sensor is about $140 form toyota. How much can really be saved by buying a cheap parts store replacement.