Updated at: 24-07-2022 - By: Lucas

There are many crucial parts of driving that depend on your car’s engine. As a result, you should take proper care of your engine and all of its components.

Using an oval-shaped plate, the throttle regulates the amount of air that enters the engine. Shaft-mounted bottle provides for ventilation and engine control by adjusting the angle of the plate.

So, can a malfunctioning throttle body cause a vehicle to fail to start?

The car won’t start if the throttle body is defective. There is no spark to start the engine until the throttle body regulates the air entering the engine. Without this regulation, it may be difficult to burn the fuel in the engine.

What Causes Of a Bad Throttle Body?

Can A Bad Throttle Body Cause A Car Not To Start

1. Sensor issues

In the case that the sensor fails, the latch inside the throttle will not open, stopping the engine from receiving air.

Fuel cannot be detected in the combustion chamber, hence the engine cannot produce a spark because the sensors are not working properly.

2. Dirt build-up

If the throttle body is clogged with dirt, the engine won’t start. The pollen dirt and the amount of particles in the air would accumulate dirt.

Smog, forest fires, strong winds pushing debris about, and new building all contribute to unclean air in the environment. The filter will catch most of the particles, but some will slip through and damage the throttle body.

3. Pssobile Issues due to accidents

An accident could cause damage to the throttle body and butterfly valve. It can’t open and close properly because of a physical accident. Throttle bodies can be difficult to fix, therefore it’s preferable to replace them when necessary.

4. Vacuum leakage

The throttle body might be damaged by vacuum leakage. A vacuum leak in the car permits air to bypass the throttle valve on its way to the air filter.

Having more air in the combustion chamber than necessary may affect the engine’s starting ability because of a vacuum leak.

What Symptoms Does A Car Experience When A Throttle Body Is Failing?

Can A Bad Throttle Body Cause A Car Not To Start-3

1. Your Car Might Develop Acceleration Issues

If the throttle body is damaged, the engine may have difficulty accelerating, resulting in the engine shutting down due to a lack of power.

Furthermore, the car may accelerate even if you don’t put the pedal to the floor. As a result, driving a car with a damaged throttle body is risky because it makes it harder to maintain control of the vehicle.

Your car should accelerate smoothly, and a malfunctioning throttle body can cause this. The sluggish acceleration is caused by a lack of control over the engine’s air-fuel combination.

Uneven acceleration is caused by an uncontrolled air-fuel combination. Even if you don’t push the gas pedal, the car can go fast at times, and slow at other times.

2. It Leads to Unstable Engine Idle

When the engine is idling, malfunctioning sensors cause instability, allowing air into the engine even when it is not needed. In some cases, the sensors might cause the automobile to run rough, cause misfiring or even stall. Consequently, the car may stutter and halt while driving due to an obstructed throttle body.

3. Unusual Fuel Consumption

In order to maintain a smooth ride and effective use of fuel, the throttle bottle body and sensors work together. However, if the sensors malfunction, you may notice an increase in your fuel usage as the modules attempt to balance out the engine’s need for more or less airflow. A malfunctioning throttle body might cause a vehicle to use more fuel than normal.

4. Warning Signs

When the throttle body is damaged, the warning indicator alerts the driver. As a result, if the dash’s check engine light comes on, it’s best to have the throttle body inspected.

Solutions to a Failing Throttle Body

The throttle body can be replaced if it is cracked, has damaged butterfly valves, or is dented. Valves may not open and a valve replacement may cure the throttle body and sensor problems.

The throttle body can be destroyed by rust, which could be fatal to the automobiles. If rust is found on the throttle body, it may be a sign of more significant problems to come.

Furthermore, the rust could suggest that there are leaks in the system. If the rust is only a minor issue, you can oil the fragile car parts to prevent additional harm.

Replace the filters regularly to keep dust and other pollutants from entering the throttle body. Because worn-out filters are more prone to admit debris into the combustion chamber, it’s important to only use high-quality filters going forward.

As a result, you should clean the air filters on a regular basis by scraping away any debris that has accumulated.

Can You Drive With a Damaged Throttle Body?

The sooner you fix a faulty throttle body, the safer you’ll be behind the wheel. A safety hazard will be created on the road if the vehicle stalls or fails to accelerate.

Because of this, learning about the symptoms of the throttle body may help you make better judgments about your vehicle.

The Replacement Cost for Throttle Body

The price of a new throttle body varies from automobile to car, depending on the make and model. The overall cost of repairs, on the other hand, might range from $250 to $650. About $200 to $500 is spent on the throttle body, and the labor costs range from $50 to $175.

Because of this, you should plan ahead, purchase spare parts from reputable vendors, and have repairs done by a trustworthy mechanic business.


The air entering the engine is controlled by the throttle body, resulting in an ignition spark. Thus, the air fuel composition is maintained.

A malfunctioning throttle body might cause the car to stall unexpectedly, causing you to lose control of the vehicle. Damage to the throttle body can put the driver and other road users in risk, so driving with a damaged throttle body is never advisable.

Rather than risking an unpleasant driving experience, it’s advisable to replace the throttle body before getting behind the wheel.