P0102 is a very common trouble code in the ford focus. If you unplug that mass air flow sensor and it runs fine again then that's telling you that you need a new air flow sensor.

For Ford Focus Mk2 Mk3 C-max Kuga Ii 16 20 Tdci Mass Air Flow Meter Maf Sensor Ebay
For the crank case vent, pull your air filter box apart and remove the engine air filter.
Mass air flow sensor problems ford focus. It is installed between the air filter and the intake manifold of the engine. A faulty maf sensor can cause your vehicle to run too rich or run too lean. At carid you can easily find a reasonably priced reliable replacement.
A bad mass airflow sensor can leave your ford focus’s engine running rough, or even inoperable. Once disassembled, you will be able to proceed to the step cleaning the mass air flow sensor of your ford focus. I'm 99% sure this is not the issue of a dirty maf, but it could be compounding a smaller.
Don't touch the wire inside either. When cleaning the sensor, be very careful because it is a delicate piece of electronics. Make sure it completely dries before plugging the sensor back in.
A properly functioning maf sensor is vital for an engine to run efficiently. It passes this information onto your focus’s ecu. This sensor will, as time passes, get dirty and its two “filaments” that will give information to your computer on the quality and temperature of the air will no longer be able to collect data properly, it is in this sense that it will disrupt the operation of the engine.
Your focus may also have no power or hesitate when accelerating. Unplugging maf normally makes the car use a kind of default reading in place of the maf sensor reading. Labor costs are estimated between $27 and $34 while parts are priced between $160 and $293.
Ford focus mass airflow sensor replacement cost. It means the the mass air flow (maf) circuit is low, and that it is not performing within its specified operating range. The ecu uses this information along with other sensor data to control the amount of fuel that enters the combustion chamber.
November 2, 2018 by jason. The car with the problem in the same make and model as. It measures the air mass and it is useful for the ecu because it can calculate exactly how much oxygen is entering into the engine.
In this photo the sensor is old and the screws which hold the maf sensor unit in the main housing had corroded. In modern cars, an intake air temperature or iat. And will skew the results of your tests which could result in the replacement of a good maf (and in the process throwing money away).
The mass air flow sensor (maf) is one of the key components of an electronic fuel injection system in your car. It is crucial, yes very critical that you first check that there are no air leaks between these two. Ford focus mass air flow sensor part number:
Your engine speed may vary at idle or fluctuate. We need to remove the sensor itself from the housing. Ford focus 2009, mass air flow sensor by delphi®.
There shouldn't be water in there. Spray the cleaner liberally and clean off all angles of the wire. A maf sensor measures the density of the air entering the intake manifold.
Fits the following ford focus years: There should be a hole where air is drawn into the box. If your 2007 ford focus has problems with the fuel efficiency, you probably have your mass flow sensor broken.
The average cost for a ford focus mass airflow sensor replacement is between $187 and $327. Your maf sensor is getting wet because there is water in the intake box. Air entering after the mass air flow sensor into the engine will negatively impact fuel injection.
Because your mass air flow meter is not working correctly, it’s going to cause a poor idle. The symptoms of a bad mass air flow sensor include a car that is difficult to start, bad fuel economy, a rough idle, lack of power especially when accelerating and sometimes a fuel smell from the exhaust fumes. My 2001 focus 1.6 petrol did not have a maf sensor.
You may need to have the light turn off with a code reader. It is better than a false reading from a dirty / broken maf but not as good as the reading from a properly function maf sensor. When it comes to maf sensors, communication with the ecm is key.
Somehow the box has gotten plugged with debris. One of the most common ford focus issues is your engine idle. Extensive coverage manufactured to meet or exceed oe requirements and testing.
The mass air flow sensor measures the amount of air entering the engine or the air flow. Below it you'll see a sponge thing. You’ll notice if the tailpipes eject black smoke or when the engine runs rough or backfires.
2006 | 4 cyl 2.0l. More likely is a problem with your crank case vent or oiling a reusable air filter too much. It detects how much air is flowing into the engine.
Pliers were needed to remove the screws The mass air flow (maf) sensor, part of your vehicle’s electronic fuel injection system, is responsible for calculating the total amount of air entering the engine. Regardless of what's actually wrong with it a faulty mass air flow sensor will not prevent an engine from starting or running.
With this information, the ecu regulates the engine parameters to ensure its right performance.

P0100 - Mass Air Flow Circuit Malfunction

Part 1 -how To Test The Ford Mass Air Flow Maf Sensor
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