Car Diagnostic Codes List: Vehicle OBD 2 Fault Codes [2024] (2024)

Is your vehicle displaying weird signals or blinking lights? To know what these signals mean, you need to know the diagnostic trouble codes (DTC).

Regarding car diagnostics, it’s important to know what the diagnostic trouble codes (DTCs) mean. They are basically codes that indicate a problem with the car.

You can read the code with an automotive scan tool to help diagnose the problem. Hopefully, you can troubleshoot the problem and get your vehicle running again by understanding these codes.

Many codes describe the problem, while others give a code that helps identify the part causing the problem. In this article, we will provide a car diagnostic code list. So, tag along till the end!

What is a Diagnostic Trouble Code (DTC)?

A Diagnostic Trouble Code (DTC) is a code the Engine Control Unit (ECU) stores after a diagnostic code test run. These codes indicate the cause of a problem with the vehicle and can help diagnose what is wrong. Mechanics also use them for troubleshooting and repairing vehicles.

There are many different types of DTCs, and they are updated regularly as new problems are discovered. Plus, codes typically have two categories: generic and manufacturer-specific. More than one manufacturer may use generic codes. In contrast, manufacturer-specific codes are specific to a certain vehicle’s make and model.

It is important to note that not all problems will generate a code, and not all codes indicate a severe problem. Often, a DTC will indicate that a sensor circuit is out of range or that there is a problem with the emissions control system. However, having a problem checked out by a qualified mechanic is always best.

How to Read Trouble Codes?

To read trouble codes, you’ll first need to know their location. Most vehicles store the trouble codes in the Engine Control Module (ECM) or Powertrain Control Module (PCM). Once you have located the module, you can start reading the codes.

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OBD-II Scanner for trouble codes list

There are a few ways to read the codes, but the most common is through an OBD-II scanner. OBD-II scanners plug into the vehicle’s diagnostic port, allowing you to read and clear the codes. Some scanners also come with software that interprets the codes and describes the problem.

Code Readers

You can also use a code reader if you don’t have an OBD-II scanner. Code readers are cheaper than scanners; you can purchase them at most auto parts stores. Code readers work the same way as scanners, but they don’t offer the same level of functionality.
Once you have the code, you can start troubleshooting the problem. Many resources are available to help you troubleshoot engine problems, including service manuals and online forums.

How to Clear Fault Codes?

Clearing fault codes is a basic and essential task that you must carry out after every repair or service on a car. You can clear fault codes by using a scanner or a code reader. The following steps will guide you through the process of removing fault codes:

1. Connect the scanner to the car’s diagnostic port
2. Turn on the scanner and wait for it to connect to the car’s computer
3. Enter the fault code(s) into the scanner
4. Press the clear or erase button on the scanner
5. The fault codes will be cleared, and the scanner will return to its normal screen

You can try resetting the car’s computer if you cannot clear the fault codes using a scanner. You can do it by disconnecting the battery for about 10 minutes. After reconnecting the battery, turn on the vehicle and check if the fault codes have been cleared. If they are unclear, you must repeat the previous steps.

How Are Trouble Codes Set?

When a car has trouble, the computer will store a code in its memory. This code is used as a diagnosis to help mechanics determine what’s wrong with the car. Several sensors, such as vehicle speed sensors, set the code in the vehicle monitoring systems. When one of these sensors detects a problem, it sends a signal to the computer, setting the code.

The diagnostic code will usually tell the mechanic what system has the problem and what specific fault the sensor detected. It can help them quickly and accurately diagnose the problem and fix it.

Car Fault Codes: Breakdown of Engine Codes Complete List

The DTC is usually in five digits, such as P0030. In this, ‘P’ indicates a powertrain code indicating a problem with the engine; the ‘0’ indicates that it’s a generic code for your car. And finally, the ‘3’ means that the problem is specifically with the ignition system.

You can learn how to read DTCs from a quick overview of the picture below.

Powertrain Codes

Powertrains are diagnostic codes that indicate a problem with the engine, transmission, or drivetrain. Powertrain codes can vary in severity from a simple warning light to a complete engine failure. It’s important to note that not all powertrain codes are created equal. Some OBD codes are more serious than others, and some can signify a bigger problem.

Many different engine codes for your car can appear when a car is being diagnosed. Here is a breakdown of some common powertrain codes.

Chassis Codes

Many different chassis codes identify a car’s make, model, and year and indicate specific features or options in a vehicle. Chassis codes are often used by insurance companies, car dealerships, and other businesses in the automotive industry.

You can find the chassis code for a particular car on a metal plate or sticker attached to the vehicle. The code may also be stamped into the body of the car. Some OBD codes are very specific, while others are more general.

There are a few different types of chassis codes. Here is a breakdown of the most common ones:

Body Codes

A body code is a set of numbers that identifies a specific part of the car. This code tells the vehicle’s components’ make, model, and year. Knowing the body code for a part can help you find the right replacement part if you need to replace it.

It can also help you know whether a part is compatible with your car. So, next time you need to replace a part of your vehicle, look up its body code.

Network Communication Codes

These OBD codes can help determine the root cause of an engine problem and help mechanics troubleshoot and repair specific issues with a car’s engine. Each code corresponds to a particular problem or issue with the engine. Mechanics use trouble codes to help diagnose engine problems and determine the necessary repairs.

Description of the OBD Reader Codes

OBD II DTC Codes List

P Codes (Powertrain), P0000 to 3499

B Codes (Body), B0028 – B1200 to B2606

C Codes (Chasis), C0035 to C1963

U Codes (User Network), U0001-U0199 and U1000-U2500

Check Engine Light Repair

If the check engine light comes on in your car, it’s important to take it seriously. The light could be signaling a simple problem, like a loose gas cap, or it could be something more serious. But don’t worry – You can fix most issues without spending a lot of money.

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How do I permanently reset my check engine light?

There are a few ways to reset your check engine light, and each one has its benefits and drawbacks. Here are three of the most common ways to reset your check engine light.

1. Using a scan tool

It is the most common way to reset your check engine light. A scan tool is a device that plugs into your car’s diagnostic port and communicates with your car’s computer. You can ensure the problem has been properly diagnosed and fixed by resetting the check engine light using a scan tool.

2. Using a key

It is the oldest and simplest way to reset your check engine light. All you need to do is insert your key into the ignition, turn it to the “on” position, and wait for the check engine light to go out.

3. Using a code reader

A code reader is a device that reads your car’s diagnostic codes. If you know the code causing your check engine light to come on, you can use a code reader to reset the light. Code readers are available for purchase at most auto parts stores.

Whichever method you choose, be sure to follow the instructions carefully. If you reset your check engine light without fixing the underlying problem, you will have to deal with the light again later.

Is it OK to drive with check engine light on?

There is a lot of debate on whether or not it is safe to drive with a check engine light on. Many people believe that it is unsafe to drive with the light on, while others believe it is safe if the problem isn’t too serious.

The truth is that it depends on the situation. It is probably safe to drive if the light is on because of a minor problem. However, if the light is on because of a serious problem, you should not drive until the problem gets fixed.

Can you reset the check engine light without disconnecting the battery?

Yes, you can reset the check engine light without disconnecting the battery. One way to reset the check engine light is to use an OBDII scanner. It is a device that plugs into the diagnostic port on your car. You can use it to reset the check engine light and diagnose any problems with your vehicle.

Another way to reset the check engine light is to use a scan tool. It is a tool specifically for resetting the check engine light on certain makes and models of vehicles. If you don’t have either of these tools, you can also reset the check engine light by disconnecting the battery for a few minutes.

FAQs

Is P0700 Severe?

P0700 is an engine trouble code that indicates a problem with the transmission. It is not a serious code and most likely does not indicate a major issue with your transmission. However, it is still essential to have the mechanic check the code.

Can a Type C DTC Illuminate a Mil?

How Do You Repair Error Code P0128?

There are a few things you can do to try and fix the problem:
1. Check the wiring and connector for the ECT sensor. Make sure to connect them securely.
2. Replace the ECT sensor if it is damaged or faulty.
3. Clean the sensor with a mild detergent.
4. Check the engine coolant temperature circuit level and ensure it is within the correct range.
5. If the problem persists, take your vehicle to a mechanic for further diagnosis and repair.

What Does Ford Code P1131 Mean?

Why Is My Engine Light On When Everything Appears Normal?

Final Considerations

There are all sorts of different DTCs, and each one means something different. So it’s important to know what they all mean to diagnose the problem with your car properly. Thankfully, plenty of resources available online can help you do just that.

Some DTCs stay “pending” and will not be clear until you fix the problem. Others are “permanent” and remain stored even after the problem is fixed. The codes are also assigned a “trouble code number” that you can use to reference the code.

So if you’re ever experiencing problems with your car, don’t hesitate to dive into those and check out what’s wrong.

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