What Warning Lights Will Fail Mot? Warning Lights and Mot

Cars can still cause some technological problems compared to the technologies used. Warning lights on the vehicles' dashboards usually indicate the problem's onset. It warns the driver to fix the problem to prevent further damage to the car. On our site, you can view the dashboard warning lights of the relevant vehicle and which brand and model car you are driving. When your vehicle gives a potential warning, you can look at the symbols and view their meanings.

The engine management light is the most commonly displayed warning sign among these lights. If you put your vehicle in MOT when this light is on, you will fail. There are many reasons why the engine light is on. Some causes are considered serious, while others are considered insignificant. If the light stays on or flashes, you should seek assistance from a qualified mechanic.

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What Warning Do Lights Fail Mot?

What Warning do Lights Fail Mot
What Warning Do Lights Fail Mot?

All warning lamps may malfunction. The important thing will be to know which warning means what. Please take advantage of our resource site, which can help you. View symbols and signs with the help of the search button on the site. Find the cause and solution of the malfunctioning light. By following the instructions, you can protect your vehicle from serious damage.

Are Warning Lights An Mot Failure?

Are Warning Lights An Mot Failure
Are Warning Lights A Mot Failure?

It would be wrong to say the same for every warning light. Some warning lights can be considered an MOT fault. MOT faults usually detect unidentified faults. This indicates that your vehicle has an unknown fault. It means a different malfunction, unlike the warning lights you display on the vehicle detail page.

Do Warning Lights Fail Mot?

You can test the base lights to check your warning lights. Let's give an example of a few of them.

  • Low beam warning light: Turn on your headlights and check your green low beam light. If your headlights come on and you see the warning sign on the dashboard, your warning lights are working.
  • High beam warning light: You can do the same for low beam headlights for high beams. If the result is the same, you can understand it is working.
  • Seat belt warning light: Start the vehicle and do not fasten the seat belt. When you warn that the seat belt is not attached, you can understand there is no problem on the dashboard screen. (Do not drive without wearing the seat belt.)

Which Warning do Lights Fail Mot?

Which Warning do Lights Fail Mot
Which Warning do Lights Fail Mot?

First, find the page with your vehicle on For this, you can use the search button or access the brand of your car from the categories on the site. Then, find the warning lights marked blue and green. These lights will usually be warning lights that you can control. You can detect troublesome warning lights by following the steps in the upper menu. To have a general fault detection, you should consult the authorized service. It is an easier and guaranteed method to detect all faults by looking at your vehicle in a computer environment.

Are Dashboard Warning Lights A Mot Failure?

Not every warning light is a MOT fault. MOT faults usually cover unidentified defects. If your vehicle has an existing fault type, this is indicated by its warning sign. However, if it is not present or this fault has not been uploaded to the system by the manufacturers, you will see the MOT light. MOT light means general fault identification for you to troubleshoot your vehicle. Detecting faults in the computer environment is a more reliable solution. In general, let's explain why an MOT light is on.

  • Oxygen emission sensor failure: Your MOT light will be active when unburned oxygen is in your car's emissions system.
  • Loose fuel filler cap: Occurs when there is a leak in the fuel filler cap. Sometimes, it burns because the cover is left open.
  • Catalytic converter warning light: It is the name of the system that converts harmful carbon monoxide into carbon dioxide. When there is a malfunction in this system, the MOT light turns on again.
  • Spark plug warning light: If there is a malfunctioning spark plug or if there is a malfunction in the ignition system, your MOT light will still come on.

All of the above reasons can be an MOT failure. With the change in MOT rules, there may be variations according to the model of the vehicle. To identify the source of the problem and protect your vehicle from further damage, you should contact an authorized service.

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FAQs About What Warning Lights Will Fail Mot?

What warning lights are an MOT failure?

All external lights on your vehicle need to be working. These include your brake lights, indicators and hazards, reverse, main beam and dipped headlights, and rear number plate light. If none of these work, you cannot pass a MOT.

Can you pass MOT with warning lights?

Many people ask us this question, and the answer is yes. The longer answer is that if the service light is not linked to any other kind of warning light, like for brakes or the engine, your car will pass its MOT.

Is a warning message an MOT failure?

If the engine warning light is on when you get an MOT, your vehicle will fail.

Will my car fail MOT with lights on the dashboard?

Many lights on your car's dashboard can warn you of the potential engine, ABS & traction system, headlight main beam, brake fluid level, power steering, and seatbelt problems. If you find a problem before the inspectors do, you won’t fail your MOT test.

Is a yellow light on the dashboard a MOT failure?

Passing an MOT can depend on the warning lights available. Generally, yellow and amber ones are listed as advisories to be fixed if needed unless there is a conflict with the requirements of the MOT test.

Can you drive a car with all the warning lights on?

The situation of all the lights in the vehicle coming on is not ideal. It could indicate a more serious issue, and it would be prudent to refrain from driving until further investigation can be conducted to determine the problem precisely. Despite this, if the vehicle appears to still function as normal, then that gives some reassurance that it may not be an overly concerning issue.

What will cause a failure on an MOT?

When it comes to failing an MOT, some of the most common reasons include lights, tires, registration plate, windscreen, windscreen wipers, suspension, brakes, and exhaust system. Most failures are linked to lights (17%), while other factors such as tires and registration plates should not be ignored either. Other elements that may cause a failure include the windscreen and any issues related to its wipers or washer jets. Suspension components can also lead to failure if they do not meet required standards, whilst brakes and exhaust systems must also be checked for faultlessness.

Why you shouldn't ignore your car's warning lights?

Warning lights on a vehicle serve as an indication that something is amiss. Failing to address these issues promptly can result in serious, costly damage and put the safety of those behind the wheel at risk. Thus, vehicle owners must be proactive and respond to any warning lights that appear without delay.

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More important content about Tips and Advice

  1. It is often argued that too many warning lights will fail mot, but this is not necessarily the case.

    What could happen is that the vehicle may fail its MOT test because it has so many faults (which can be anything from a faulty light to a serious problem such as rust) that it exceeds the number of faults allowed.


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