How To Clear OBD1 Codes Without A Scanner In Your Car?

It may seem difficult to clear OBD1 codes without a scanner in your car, but with a little perseverance and knowledge of the basics, you can do it. OBD1, which stands for On-Board Diagnostics 1, is a system used in older vehicles, typically those produced before the mid-1990s, to monitor the performance of the vehicle’s numerous components. Trouble codes, which act as covert messages, are produced by your car’s computer when it detects something isn’t quite right. These codes are crucial since they enable you to diagnose your car’s problems.

The problem, though, is that not everyone has access to an expensive OBD scanner to read and remove these codes. We’ll demonstrate how to clear OBD1 codes without a scanner with some easy, affordable ways for you to clear those OBD1 codes without a scanner in this article. Anyone can comprehend and use these tactics; you don’t have to be an expert in cars. So let’s begin the journey toward a vehicle that runs more smoothly and doesn’t require an expensive scanner!

What Are The OBD1 Codes In A Car?

Before learning about how to clear obd1 codes without a scanner. Firstly, let’s see what are the OBD1 codes. A car’s OBD1 codes resemble coded communications from the computer. OBD1, which stands for On-Board Diagnostics 1, is a technology used in older vehicles, typically those produced before the mid-1990s, to monitor the condition of the vehicle. The computer in your automobile produces these codes to let you know what’s wrong when something goes wrong. For instance, a code like “12” may indicate a problem with the vehicle’s power source or battery.

Therefore, each number and letter in these codes, which occasionally only include letters, has a distinct significance. These codes aid both mechanics and car owners in diagnosing and resolving issues. OBD1 codes are essentially your vehicle’s way of screaming, “Hey, something’s not right here!” Investigate it when you see one to make sure your car is kept in good shape. They are essential for identifying problems.

Common Causes Of The OBD1 Codes In A Car

OBD1 trouble codes act as covert communications from the computer in your automobile, alerting you to a potential issue. Your car is signalling an issue with these codes by saying, “Hey, we have one here!” Here are a few typical reasons of OBD1 fault codes, with clear explanations.

1. Loose Gas Caps:

Unexpectedly, a simple loose gas cap can set off an OBD1 code. It resembles a little leak in the evaporative emissions system of your car. It usually reads “44” or “45,” which means “Hey, check the gas cap!”

2. Faulty Sensors:

Numerous sensors in your car monitor your surroundings. If one malfunctions, an OBD1 code such as “13” (for the oxygen sensor) or “22” (for the throttle position sensor) may appear. The sensor needs attention if it displays these codes.

3. Wiring Problems:

There are numerous connections within your car that convey messages from sensors to the computer. You can receive odd codes if these wires become corroded or damaged. These issues can be resolved by repairing the wires or connectors.

4. EGR Valve Issues:

How much exhaust gas is returned to the engine is managed by the Exhaust Gas Recirculation (EGR) valve. It may result in codes like “32” or “33” if it becomes stuck open or closed. The EGR valve needs to be checked, and your automobile is informing you.

5. Issues With The Ignition System:

Codes like “12” (battery disconnected) or “42” (Electronic Spark Timing fault) can be caused by issues with the ignition system. These codes alert you to issues with your car’s smooth starting and operation.

These are only a few typical reasons why OBD1 problem codes appear. It’s like learning a hidden language your car employs to express problems if you can decipher these signals. Don’t freak out if you see one. Instead, look into the issue and deal with the root of it to quickly restore your car to normal operation.

How To Clear OBD1 Codes Without A Scanner In Your Car?

It may sound difficult to clear OBD1 codes without a scanner in your car, but it’s possible with a few straightforward techniques. OBD1 codes act as electronic communications from your car, alerting you to potential problems. Now let’s explore how to clear these codes without an expensive scanner.

1. Examine Your Gas Cap:

Sometimes a damaged or loose gas cap will cause the “check engine” light to illuminate. Additionally, if it needs to be replaced, you need to just tighten it. The light could dim as a result of this.

2. Remove The Battery:

Try disconnecting your car’s battery if tightening the gas cap doesn’t help. This will restart the machine and could possibly remove the code. You should be prepared for the possibility that it may potentially remove other settings, such as your radio presets.

3. Implement The Paperclip Trick:

In order to use the paperclip technique, the diagnostic connector on your car must have two specified pins connected. For your specific car’s make and model, you must locate the appropriate pins. While there are internet instructions to aid, it can be a little difficult.

How to Start a Fire with a Paperclip and a Car Jump Starter Battery Pack -  YouTube

4. Driving And Observing:

The code can occasionally be cleared by simply driving your automobile for a bit. The code might go away on its own if the problem is brief or small. However, the code will reappear if the issue continues.

5. Reset Manually:

For information on how to manually reset the codes, consult your car’s owner’s manual or search online. As each automobile varies somewhat, make sure you follow the instructions for your particular make and model.

6. Fix The True Issue:

The best technique to remove OBD1 codes is to resolve the underlying problem. Replace a sensor if it is damaged. Repair any damaged wiring if there is any. Service the EGR valve if it is malfunctioning. In most cases, the code disappears on its own after you’ve fixed the issue.

Simply put, start with the easy tasks first, such as checking the gas cap or unplugging the battery. Try more sophisticated techniques like the paperclip trick or manual resets if those don’t work. But keep in mind that these methods only work momentarily. You should focus on the underlying issue if you want a long-lasting fix. By doing so, you can keep your automobile in good working order while saving money on pricey scanners.


Now that we’ve covered how to clear obd1 codes without a scanner. Remember, it is feasible to clear OBD1 codes without a scanner if you take the proper steps and have a basic understanding of your car. Always try straightforward fixes first, such as checking the gas cap or unplugging the battery, and if the issue persists, think about more complex remedies like the paperclip technique. Keep in mind that while these techniques could temporarily remove the codes, resolving the root cause is necessary for a lasting solution. By using these techniques, you may restore your car’s flawless operation while saving money on pricey scanner tools.