How To Replace a Ford Fiesta MAF

How To Replace a Ford Fiesta MAF


Variable valve timing is nothing new to the world of performance automobiles, but the Ford EcoBoost may be transforming small displacement engines all together. We’ve recently reviewed the new 2014 Ford Fiesta, and we love the small 1.6 liter engine and how responsive and torquey it was.

Despite a hot wire mass air flow sensor, the 1.6 liter Ecoboost felt a lot like older turbocharged built B16 VTEC engines. While it’s not always ideal for a turbocharged performance engine to run MAF, it’s quite the capable performer for what it is.

You may encounter mass air flow sensor problems however, whether from MAF failure or clogged intake filter. When you have a P0174 or P0171 or similar MAF related OBDII trouble code, you’ll need to know how to replace a Ford Fiesta MAF sensor.

Today we’re looking at the 1.6 liter turbocharged Ecoboost engine in a 2014 Ford Fiesta, and showing you how to replace a Ford Fiesta MAF. Before you begin our guide, it’s a good idea to disconnect the negative terminal of your battery before starting.


Remove the upper engine cover by sliding towards you and lifting upwards.


Now with the Ford Ecoboost engine cover removed, locate your mass air flow sensor and MAF housing, which is connected to your intake box. Unfortunately the orientation of your Ford Fiesta MAF makes it difficult for you to remove the MAF sensor from the housing while it’s still in the car.


To remove this MAF, you will need to disconnect the intake pipe and rotate or lift on the housing to reach the screws. First unplug the MAF by pulling up on the red locking tab, and depressing the connector to remove.


Unplug the MAF connector and set this to the side. Now you can begin loosening the clamps that connect the intake snorkel and pipe to your throttle body. Start on the mass air flow sensor side of the pipe, as designated in the image below.


After loosening this clamp, you will need to rotate or disconnect the PCV hoses as well as this quick disconnect hose.


You will need to clear these hoses in order for your intake pipe to be removed. Undo the clamp on the throttle body, as shown below. This clamp can be difficult to reach or access.


Now remove the intake pipe and snorkel and with this part removed, you should now be able to pull up so that you can reach the two screws that hold the MAF in your Ford Fiesta MAF housing.


Replace your MAF sensor by unscrewing it and replace with your new unit. Reconnect your engine harness and make sure to depress the red locking clip upon completion of our How To Replace a Ford Fiesta MAF Sensor Guide.

If you are here on this page to resolve a OBDII trouble code, the typical MAF codes do apply, but in the 2014 Ford Fiesta the P0068 code can also apply. The error code P0068 is not common and the specific verbiage for this code is Throttle Position Correlation Error.

This means that your ECU can either not dictate the airflow reading from the MAF, or you have an error with your throttle position sensor. If you have any questions or comments regarding the elusive P0068, leave them for us below.

Congratulations you now know how to replace a Ford Fiesta MAF, make sure to use a data logger or scan tool to clear any codes that may have arisen from your MAF sensor being bad.