The mass airflow sensor (commonly abbreviation to MAF) is one of the most important engine monitoring sensors. A bad mass air flow sensor have the right to leave her Jeep grand Cherokee’s engine to run rough, or even inoperable.

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A MAF sensor measures the density of the wait entering the input manifold. It passes this information onto your grand Cherokee’s ECU. The ECU provides this information in addition to other sensor data to manage the quantity of fuel the enters the combustion chamber.


If girlfriend do recognize that you need a brand-new mass air flow sensor, they aren’t as well expensive. And, most of the time they are right by the wait box and easy come replace.

Faulty Mass air flow Sensor Symptoms: Jeep cool Cherokee

When the mass air flow sensor has gone bad, you’ll definitely feel it. Here are the most usual symptoms that a bad or failing MAF sensor:

Idle Issues– Your grand Cherokee may run affluent or lean once idling, or that may also idle erratically. A rich problem is as soon as there is not sufficient air loved one to the fuel in the air/fuel mixture. The exhaust shade is generally darker as soon as running rich. A lean problem is as soon as there is too lot air family member to fuel in the air fuel mixture. The exhaust color usually doesn’t change. Hard come Start– Without learning the ideal amount of air entering into the intake, it deserve to be really difficult for the engine come start. And when the does, the doesn’t commonly run really well. Decreased Fuel Mileage– Fuel mileage can suffer without the ideal air/fuel mixture.
Here a couple of typical MAF sensor styles

Grand Cherokee negative MAF Sensor Diagnosis

If the MAF sensor has actually gone bad, it’ll create the inspect engine light and carry out an OBDII problem code. This is great because it helps you narrow under the problem. The 2 most common trouble password in relationship to the MAF sensor are:

There are other codes concerned the fixed air flow sensor together well, however these room the most usual ones. Here’s a terrific video on exactly how to diagnose a poor MAF sensor using a multimeter from Ratchets and Wrenches ~ above YouTube.

Cleaning the Mass air flow Sensor

Often, the mass air flow sensor yes, really only requirements cleaning as soon as they walk bad. Some folks recommend using alcohol due to the fact that it’s usually on hand, and also can clean the sensor. This is a bad idea, the can destroy the sensor. Provides mass air flow sensor cleaner. It’s really cheap and easily accessible at any kind of parts store. It sure beats the hell out of having actually to purchase a brand-new sensor.

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Locate the MAF Sensor– It’ll be in between the waiting filter and also the throttle body. Eliminate the Sensor- Take treatment not to damages the wiring exploit or the connector pins that obtain the harness in the MAF. Basic hand devices will it is in all that you require to finish the job. Clean the Sensor– now that you’ve removed your grand Cherokee’s MAF sensor, it’s time to clean it. You’ll need the MAF cleaner. You are no scrubbing anything. Permit the chemicals perform their job. About a dozen little bursts will certainly be all that you need. Replace the Sensor


Replacing a bad MAF sensor deserve to make your grand Cherokee feel like a new vehicle. An excellent luck with the diagnosis. If over there is anything that you would favor to add, you re welcome feel totally free to leave a comment below.