How To Repair P0102 In A Saab 9-3

P0102 is a very common trouble code with the Saab ix-3. It means the the Mass Air Flow (MAF) excursion is low, and that it is not performing inside its specified operating range.

Nosotros volition cover exactly what that means and potential fixes for it below. It should be considered a high priority to fix, as the MAF sensor non reading properly can actually make an touch on the functioning of the vehicle.

Saab 9-3 P0102 Trouble Code Diagnosis

Information technology's important to empathize what the MAF sensor does. Information technology measures the air density and volume between the air filter and the intake manifold. The engine's calculator uses this reading to determine the exact amount of fuel that it needs for optimal combustion. When it is not getting the proper reading, information technology can really cause issues with your 9-three.

Related: Saab 9-3 P0101 Diagnosis: MAF Sensor

P0102 Symptoms: Saab 9-iii

Since P0102 has to do with the Mass Airflow Sensor, which is a huge office of the nine-3's engine combustion process metering, it is going to cause noticeable symptoms.

Unremarkably, one or more of these symptoms will occur, but information technology's not uncommon to accept no symptoms other than the bank check engine light.

P102 symptoms include:

Service engine shortly low-cal
Poor idle
Stalling
Hard starts
Poor performance
Improper air/fuel mixture

Saab 9-3 P0102 Causes

P0021 Saab 9-3

Here are the most common causes of P0102 in the Saab 9-three. They are presented loosely in lodge from most to least probable:

MAF Sensor Dirty– Over the course of its life, the MAF sensor will often become and then covered in crud that it'll no longer get an accurate reading. They can exist cleaned, but information technology's easy to mess 1 up by treatment it wrong, and you don't want to use a wire brush. Here's a great article on exactly how to make clean i from Family unit Handyman. MAF Sensor Cleaning
MAF Sensor Failure– While it is very probable that the MAF sensor itself could exist the problem, it's admittedly necessary to test information technology earlier you lot replace it. Here's a video on how to test i without pulling it. This is important for ii reasons, the outset is that they are expensive, and the second is that it only takes a few minutes to test one with a multimeter. If y'all do need one, they are pretty reasonable on Amazon. Simply make certain you lot bank check to brand sure it fits your yr ix-3 before purchasing.
Intake Manifold/Vacuum Leak– If at that place is a leak in the intake manifold, information technology will be impossible for the MAF sensor to get an authentic reading. Without knowing how much air is actually getting into the engine, P0102 will exist thrown.
MAF Sensor Wiring– Make sure to cheque effectually the MAF sensor for opens or shorts. Start by inspecting the wiring harness for obvious damage. If you don't see whatsoever you can use a multimeter to exam the wiring. At this point if you lot use the YouTube video above in the MAF sensor dirty section, and there turns out to be no voltage at all, try checking out How to Find an Electrical Short on Virtually Any Vehicle from BackYardMechanic
Clogged Catalytic Converter– If you are getting P0102 in your 9-three accompanied past a noticeable lack in power at speed, it may very well be that yous have a chock-full catalytic converter

Conclusion

Any the reason for P0102 in your Saab 9-3, ignoring it is a bad thought. Good luck figuring information technology out, and if there is anything you lot'd like to ad, please get out a comment below!