How to Fix Code P0000: Meaning and Solutions

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OBD scanner with code P0000 on the screen

Did you know that we need to scan our vehicles for trouble codes even when the Check Engine Light is off? It's true! Some trouble codes like P0000, in some cases, don't even have a Check Engine Light associated with them.

This trouble code stands for "No Activity Detected." It means that the Powertrain Control Module (PCM) couldn't find anything wrong with your car after performing its self-diagnostics

So what do you do now? This blog post will discuss the P0000 code, possible causes, and fixes for this issue.

What is Code P0000?

The code P0000 is an invalid code that means “No-Fault.” The question is, are there no problems associated with this trouble code?When the Malfunction Indicator Lamp (MIL) or the Check Engine Light illuminates on your dashboard, the Engine Control Unit (ECU) has detected a problem. To see what Diagnostic Trouble Code (DTC) is triggered and causing the issue, you need to hook up an OBDII scanner to retrieve these in the ECU’s stored memory.

With the 10,000 DTC codes that an ECU can save in its system memory, it is rare to have a “no-fault” result so having a code P0000 is confusing because it seems to make no sense. And since it's an invalid code, it shouldn't be displayed on your OBDII scan tool.

If you look closely, you'll find that this code begins with P00, making you think it's somehow related to "Fuel & Air Metering and Auxiliary Emission Controls Read.” However, since this code is invalid, it is not the case. So, what does this cause?

Symptoms of Code P0000

If there is no underlying issue with your car's engine, you may not experience any symptoms, not even an illuminated Check Engine light. However, if there is a problem with the engine, you may notice drivability issues, and your MIL may illuminate. 

Causes of Code P0000

Having a code P0000 can be confusing, mainly when no signs manifest on your car. However, this code is usually caused by simple problems, including:

  • Incompatible OBD scanner with the year, make, and model of the vehicle
  • Using a cheap or less capable OBD scanner

How to Fix Code P0000?

If your check engine light is not flashing and you are not experiencing any drivability issues, you may continue driving as this only means that there is no problem with your vehicle. There are chances that the scan tool you are using is defaulting to the "P0000 – No DTCs (Diagnostic Trouble Codes) Reported" reading, so there is nothing to worry about!

On the other hand, if the (MIL) Malfunction Indicator Light is illuminating on your dashboard and you're having drivability issues, this means that your scan tool isn't capable of reading your car thoroughly. There are chances that your scanner is incompatible with the make and model of your vehicle. 

With over 1,000 P0xx (DTCs) Diagnostic Trouble Codes specified by SAE International (Society of Automotive Engineers), there's a possibility that the code P0000 is replacing the real one. So what do you need to do in that case?

You might need to use an advanced scan tool because, as mentioned earlier, one of the causes for a P0000 code using a less capable scan tool is that the scanner can't communicate with your vehicle's computer.

Using an advanced scan tool, check again for trouble codes. If the code P0000 has been cleared, but other error codes took place, they will need to be diagnosed and repaired before the P0000 code can be considered fixed. Once all codes have been cleared, road test your vehicle to see if the MIL has been turned off.

Common Mistakes When Diagnosing the Code P0000

Since this error code is invalid, it's essential to be aware of all the information before diagnosing it to avoid unnecessary repairs. The following are the common mistakes when diagnosing the code P0000.

  • Not checking for other codes that may have been set when this code was stored.
  • Repairing or replacing parts that are not related to the problem.
  • Using a cheap OBDII scan tool without verifying it is compatible with your vehicle's year, make and model.

Code P0000 FAQs

1. Is the P0000 Code serious?

It depends on the situation. If you have drivability issues, there are chances that this error code is hiding the actual fault code that may be severe. So it is best to scan for other trouble codes using an advanced obd scanner to get an accurate diagnosis.

2. Can I drive while having this error code?

If you have drivability issues, it is best not to drive the vehicle. However, if you are not experiencing any problems, you can drive the car as normal.

3. What should I do if this code pops up?

You should scan for other trouble codes using an advanced obd scanner to get an accurate diagnosis and then take appropriate actions.

4. Is P0000 a generic code?

No, P0000 is not a generic code. This code is specific to certain makes and models of vehicles.

5. What make and model of a car usually gets the P0000 code?

This code is usually seen on Ford, GMC, and Dodge vehicles. However, it can appear on other makes and models as well.


In conclusion, if you experience the Code P0000 but your check engine light doesn't come on, there are chances that an incompatible code scanner causes the problem. However, if the code persists or your check engine light does come on along with drivability issues, it is best to scan for other trouble codes and fix them accordingly. 

If you think you are not confident enough to fix this yourself, please consult a professional mechanic for further diagnosis and repair. Thanks for reading!