How to Install a MAF Sensor on a 2001 Ford Focus ZX3?

Answer The mass air flow (MAF) sensor determines the quality and volume of air passing through the air intake hose leading to the engine. Once it takes a measurement, it sends a signal to the Ford Focus' ... Read More »

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How to Install a Ford Focus O2 Sensor?

O2, or oxygen, sensors on a Ford Focus monitor the mix of oxygen ratio to burned fuel in the exhaust system. They transmit this data to the powertrain control module, or PCM, which then adjusts the... Read More »

How to Install an Air Temperature Sensor to a Ford Focus?

The air temperature sensor, along with the oxygen sensor, are used by the onboard computer to calculate expected air/fuel ratios to provide good power and fuel economy. The air temperature sensor (... Read More »

How to Install a Headlight Bulb on a 2001 Ford Focus?

In the 2000 model year, Ford released the Focus as the replacement for the Escort. The 2001 Ford Focus had two 2.0-liter engine options available: a SOHC version that produced 110 horsepower and a ... Read More »

How to Install a Fuel Pump on a 2001 Ford Focus?

The fuel pump for the 2001 Ford Focus is installed within the fuel tank itself. Installing a new pump requires you to remove the tank from the car and remove the old pump from the tank first. Given... Read More »