Ford Wrench Light No Codes: 6 Reasons & What To Do

Looking for reasons behind Ford wrench light coming on? And you scanned the engine but got no codes? Read on to find out why this happens and what to do about it.

You may panic if you see the wrench light on your Ford vehicle turn on.

You may think there is an issue with the engine and decide to scan the vehicle. You become more confused when there are no codes.

Most likely, the Ford wrench light coming on with no codes on scanning the engine indicates the malfunctioning of power train components.

However, there can be other reasons, too, like a dead battery, carbon deposits on the throttle body, or low oil pressure.

Ford Wrench Light No Codes

Why Does The Wrench Light Come On in My Ford Dashboard?

The wrench light coming on on the Ford dashboard indicates some issues in the power train.

There are a lot of components in a power train, like a clutch, gearbox, transfer case, differential, propeller shaft, and many more.

An OBD-11 scanner (a code reader that can detect trouble codes, making it easier to detect issues in your vehicle) that can read PCM(Power Control Module) codes can point problems in a specific direction.

But if you cannot use scan tools, you need to inspect various issues to detect the problem causing the wrench icon to illuminate on the dashboard.

The limp mode gets activated when there is an issue in the transmission system or power train.

It switches off some of the less essential parts of the vehicle, like air conditioning and many more.

We are discussing below a few reasons which can cause the wrench light to illuminate on the Ford dashboard.

Also read – Risks of leaving your car at your mechanic’s overnight

1. Low Oil Pressure

The motor or engine oil acts as a lubricant and helps lubricate various internal combustion engine parts.

Thus the oil helps in increasing the performance of the engine. But a decrease in oil pressure can trigger the wrench light on the Ford dashboard.

If you neglect it and continue driving with low oil pressure, it will decrease the life span of the engine components.

The problem usually happens if you have not changed the oil for a long time. Motor or engine oil becomes dirty with time and must be changed regularly.


Change the engine oil to fix the issue. Ford recommends doing an oil change within three to six months.

Also read: F150 interior lights won’t turn on. What to do?

2. Low Transmission Fluid

The work of the transmission fluid is to lubricate different transmission components. Additionally, it reduces the operating temperature and increases the cooling function.

But there should always be a proper level of transmission fluid. Low levels can cause problems in gear shifting and even cause the wrench light to turn on your Ford dashboard.


You need to flush off the old and dirty transmission fluid from time to time.

But if you have recently topped off with transmission fluid and it’s low, then you need to fill it to the proper level.

Before doing this, you need to check the transmission fluid leakage.

Take an old cotton cloth and, with its help, check all the components of the vehicle’s transmission system.

You must also check the hoses carefully; if you find any leakage, correct or replace it before topping the transmission fluid.

Also read: Are Dodge Rims Compatible with a Ford?

3. Battery Problems

A weak or dead battery can also be the reason for the wrench warning light to turn on the dashboard.

The warning light triggers when the PCM of the vehicle gets some wrong information from the engine sensors.

A weak or dead battery is not sufficient o provide proper voltage to the sensors; thus, sensors give wrong information to the PCM.


Inspect the battery, and if required, try to replace it. You can confirm the weak battery by connecting the spare battery and starting the engine.

If the wrench light doesn’t illuminate this time, it’s because of the old battery, which must be replaced.

4. Transmission Problems

Transmission issues are the primary cause for triggering the wrench light.

Some common transmission problems are worn-out gearboxes, malfunctioning sensors, or defects in PCM.

You will find the possible symptoms in the vehicle when there are transmission problems. We are listing them below.

  • The engine refuses to start
  • Reduce gas mileage
  • Noise comes from your vehicle.
  • Rough start
  • Loss of power

Some of the OBD 11 codes for power train malfunction are codes P0705, P0601, and many more.


The transmission system of Ford vehicles is quite complex, and it will be pretty challenging to find the exact problem.

Driving with transmission issues can be life-threatening and cause massive damage to the vehicle.

You must take your vehicle to the nearest mechanic to detect the exact issue.

5. Problems In Carburettor

Carburettor is a device in the engine that helps control the airflow mixture entering the engine.

Malfunctioning of the carburetor can lead to overheating issues.

The vehicle computer can easily detect a problem in the carburetor and cause the wrench light to illuminate.


If you are experiencing overheating issues or jolting while accelerating, it is because of a faulty carburetor.

You need to take your vehicle to the nearest auto repair shop. The mechanic will diagnose the carburetor and, if required, replace it.

6. Throttle Issues

If you are having issues accelerating your vehicle and you observe a wrench light illuminating the dashboard, there may be problems in the throttle body.

The throttle’s primary role is to control the air that must be entered inside the engine based on the driver’s input on the pedal.

The throttle position sensor is present on the throttle body, whose work is to sense the position of the throttle body and provide that information to the ECU.

But carbon accumulates in the throttle with time, so the throttle body doesn’t function properly.

Some of the common symptoms of throttle body include

  • Hard to start
  • Poor acceleration
  • Vehicle stalling


Oil or carbon can build up in the throttle body with time.

You need to check the throttle body, and if you find that carbon has been deposited, clean it and install it.

If it is too old and dirty, replace it with a new one.

Frequently Asked Questions

Why is my wrench light on no codes?

If your wrench light is on but there are no codes, it typically indicates a mechanical malfunction.
This could be caused by a faulty wiring connection or a worn component.
Other possible causes could include low system voltage, dirty oxygen sensors, or even air mixture issues sensing an engine misfire within the cylinders.
It’s important to correctly diagnose the cause of the light being on in order to avoid unnecessary repairs and maintain your vehicle’s performance.

What does wrench light mean on Ford?

The wrench light on a Ford vehicle is an indicator that there is a mechanical problem.
It can be caused by several things, from a loose gas cap to something more serious like a failing catalytic converter.
When this light comes on, it usually means that the car should be taken to a service station for inspection and repair.
If not fixed right away, the issue could worsen and cost the car owner more money in the long run.

Can you drive with the wrench light on Ford?

Generally, you should never drive with a warning light illuminated on your dashboard.
This includes the wrench light on Ford vehicles.
While it is possible to drive a Ford vehicle with the wrench light on, it is not recommended; this light typically indicates a more serious issue that should be addressed immediately by a professional mechanic.
Driving further without having the issue fixed can cause you to incur additional damage and cost, so it is always best to get the issue taken care of right away.

How do I reset my wrench light?

Resetting a wrench light is an easy process.
First, you will need to turn off the engine and disconnect the negative battery cable. Next, press and hold down the trip reset or reset button.
Then start the engine and wait for the wrench light to come on.
Finally, when it does come on, press and hold down the reset button again until it turns off.
Once it’s been turned off, then reconnect the negative battery cable before driving your car again.

How serious is a powertrain malfunction?

A powertrain malfunction can be very serious and should never be taken lightly.
Depending on the cause, a powertrain malfunction could lead to costly repairs, an inability to drive your vehicle, or even a crash.
For example, if there is an issue with the transmission, it can cause jerking or slipping, which can lead to an accident.
Additionally, components of the engine, such as the spark plugs and oxygen sensors, can affect fuel efficiency, leading to more frequent visits to the gas station and higher emissions levels.
To avoid any issues due to a powertrain malfunction, it is important to have regular maintenance performed on your vehicle and address any potential issues as soon as possible.


The wrench light is similar to the check engine light but differs slightly.

The check engine light is present almost in every vehicle and is a part of the OBD system.

But the wrench light is there only in Ford vehicles, and illuminating this light on the dashboard indicates a problem in the engine or transmission system.

Other reasons include a dead battery, a bad carburetor, or low oil pressure.

Thank you for reading this article.

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Sean Mendez

Hi, I am Sean, a self-confessed petrolhead. I live in Boise, Idaho with a busy family of four and our energetic Labrador retriever. Thank you for visiting my website. You can find my email on the contact page.

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