Due to the incredible number of new threads asking about getting a CEL after the installation of an AEM
or Injen Intake
, I thought I would make a thread about the most common solutions. Mods, if you find it worthy, I would like it stickied.
FIXING A CEL (CHECK ENGINE LIGHT) AFTER AN Intake
Complete these steps in the listed order, do not skip around.
Check ALL of the vacuum lines and make sure that each one is attached correctly and is in the right place.
Check to make sure that the MAFS (Mass Air Flow Sensor) is inserted into the Intake
The MAFS is shown in this picture, it's the large black square on the Intake
It's in this photo as well.
If you are positive that all of the vacuum lines and the MAFS are in their correct places, the next step is to reset the car's ECU (Engine Control Unit, the car's brain).
Follow these steps:
1. Disconnect the negative battery terminal (the black one).
2. Let the car sit for AT LEAST 15 minutes, it's recommended that you wait a half hour.
3. Reconnect the battery terminal and start the car to make sure that it's connected properly.
Clean the MAFS. Follow these instructions EXACTLY.https://www.celicahobby.com/ubbthreads/thread.f_1862388016_0_collapsed_2__1.html
You are trying to clean the 2 air flow sensor wires which live inside of the MAFS. They are small and hard to see, but they're there and expensive to replace. You also need to clean the contacts between the wiring harness and the MAFS housing.
If you complete all of the above steps and the CEL remains, take your car to either your Toyota dealer or an auto parts store and ask them to check what CEL code the ECU is throwing. You'll recieve and number and about 5 words which will give a small description of the problem. Be sure to write the code down so you can post it, and we will try to help you troubleshoot what it is and how you can fix it. We're here to help.