How to Reset Fuel Cut Off Switch (Inertia Switch) on Ford Fiesta

Engine cranks, but it won’t start. Sound familiar?

After passing over a bump in a road, speed bump or after a car accident, you could end up with you engine unable to start.

You might think that there is some major motor damage or malfunction that caused this, but in most cases you only need to reset the fuel cut off switch which was activated by the impact.

Many vehicles come with fuel pump shut-off switches. Inertia switch is a security measure implemented by car manufacturers in order to shut off the fuel supply in case of a car crash or some accident where vehicle comes to a sudden stop instantly.

This is similar to electrical circuit breaker in your home which can be easily reset by pushing the button or pulling the leverage down. All modern fuel injection cars are equipped with an inertial fuel cut off switch that shuts off power supply for the fuel pump if the vehicle is in a collision. This prevents fuel (under pressure) being pumped from the fuel tank in case fuel line is damaged during the accident.

To start the engine after a car accident you need to find fuel cut off switch location (car inertia switch) and reset it

I had an accident with my 1.25 ccm Ford Fiesta 2006 and after a crash car would not start. I figured out that there must be some kind of fuel cut-off switch but the problem was that I could not find/locate it! After some research of possible inertia switch location, I narrowed down the potential location to somewhere behind the drawer / glove compartment on passenger side (which is right side of the vehicle on US/EU cars and left side on UK/AUS cars).

Steps to locate and reset fuel cut off switch on Ford Fiesta

  • First, open the glove compartment
  • Pull out the glove compartment by firmly pressing left side toward inner section
  • Look for device with rubber yellow cap on it
  • Push the rubber yellow cap on inertia switch

ford inertia switch


how to find ford fiesta inertia switch - fuel cut off switch

how to reset ford fuel cutoff switch

Now put the key in and start the engine. You might need to crank it up a few times before the motor is started. And that`s it. You have just saved at least $50 for the mechanic…

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3 Responses

  1. marian says:

    I have Ford focus Ghia 2.0 16V TDCI from 2006. Where it is located fuel cut off switch?
    Thank you so much for help.


  2. Don Brand says:

    I have a 03 ford explorer sport and have been experiencing problems with the inertia switch tripping, I thought. After ordering a replacement, I discovered the switch is fine. The problem is in the connector which is fried. After researching further on the internet, I found this seems to be a very common problem with these connectors. Seems they are either poorly designed or underrated for the current. I just by-passed the switch and connector. Problem solved!

  3. 2005 fiesta owner says:

    Man thanks a lot!!! today i got my ford fiesta back home on a platform from a repair shop, not a mechanic, just a repair shop and my pump would n`t start so i thought i have to change it
    I started looking on internet on how to unlock my pump and i found your article and it save me from buying a fuel pump and paying for a mechanic!!!
    After the push button it started, thank you for this article!!!!

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