How to Fix Code P1000: What It Means and How to Address It

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When your Check Engine Light illuminates on your car dashboard, it's telling you that your car's onboard computer has detected a problem. But in the P1000 code case, it may be a simple issue, so don't panic! 

This article will discuss this fault code, including its meaning, causes, symptoms, and possible fixes!

What is Code P1000?

The trouble code P1000 is defined as “System Readiness Test Not Complete.” The Engine Control Computer (ECC) failed to complete its diagnosis cycle. Car models such as Mazda, Ford, and Jaguar commonly use this code.

To validate whether the emission system is in good working condition or something is wrong, you should perform and complete a series of tests. When the engine control module doesn’t finish all of its required emission tests, the OBD scanner will trigger the P1000 code.

However, the definition may vary depending on the make and model of the vehicle. See the example below.

  • For Ford, when the P1000 code is on, the OBD II system monitor hasn't been run and completed.
  • For Kia, the P1000 code means System Diagnosis Incomplete.
  • For Jaguar, the P1000 code means Engine Control Module (ECM) – Internal Error.
  • For Land Rover, the P1000 code means ECM memory erased – No Codes Stored.
  • For Mazda, the P1000 code means OBD II Drive Cycle Malfunction.

Symptoms of Code P1000

The good thing is that this code doesn't indicate any problem with the emission system or the engine. In some cases, you won’t be experiencing symptoms at all.

Causes of Code P1000

The P1000 code has different causes depending on the make and model of the vehicle. However, in some cases, the reasons may be similar. The following vehicle models below have the same causes of the P1000 code:

For Ford, Mazda, and Kia

  • If the vehicle is new from the factory
  • Illuminated check engine light
  • The (PCM) Powertrain Control Module battery has been disconnected.
  • The computer system detects a trouble code that has been cleared already.
  • The OBD monitor failure occurred before the completion of an OBD drive cycle.

How to Diagnose Error Code P1000

This error code is one of the simplest to resolve. In fact, in some cases, a mechanic may not be required at all, especially if no other code is present. The code will most likely vanish on its own.

However, if the code P1000 features other error codes, then further diagnosis is recommended to ensure you fix the problems your car may have.

There could have been other error codes generated before the code P1000, or there could have been other codes that your OBD scanner could not detect because the process was interrupted. In this case, a more thorough diagnosis is recommended.

How to Fix Code P1000?

If other trouble codes accompany the code P1000, the first step is to fix the other codes. Once those are cleared, the P1000 may also clear. So how do you fix the other codes?

  • Start by reading the freeze frame data with an OBD-II scanner to check for additional faults.
  • If other error codes are stored, inspect and repair those systems.
  • After clearing all the other codes, start the drive cycle to see if the P1000 code returns. If you're unsure          how to do it, you may visit our guide to complete a drive cycle.

If code P1000 persists, it might be necessary to manually use factory-specific software to command a series of readiness checks. Once the inspections are finished, P1000 should be reset. Also, make sure the battery of the PCM is connected correctly.

Common Mistakes When Diagnosing the Code P1000

Although this error code is pretty straightforward, a few things can go wrong when trying to fix it. Some of them are:

  • Not ensuring if the diagnosis is applicable with the vehicle’s make and model
  • Not checking the PCM battery if connected

Code P1000 FAQs

1. Is this code serious?

When it comes to severity, this code is harmless. This code would not manifest any drivability issues and will clear itself automatically. Vehicle owners can often ignore this problem, as it can go away as part of normal driving.

2. Is it safe to drive with the P1000 code?

Yes, it is safe to drive with this code as you will not experience any drivability issues. However, it is best to scan for other trouble codes as the P1000 might indicate another problem.

3. How do I clear the P1000 code?

This code can either clear itself or will have to be cleared by a technician with a scan tool.

4. Do you have to take your car to a mechanic to fix it, or is there a DIY solution?

It depends on the situation. If the code P1000 is associated with other codes, you may need to have it checked by a mechanic. However, if you can diagnose it yourself, you can rely on our guide above.

5. Can I prevent the P1000 code from coming back?

You can prevent the P1000 code from returning by keeping up with your car's maintenance schedule. This includes regular oil changes and tune-ups. Additionally, fix any other codes that may come up as they could be related to the P1000 code.


The P1000 code is not as severe as we think. It's a warning that lets us know something might be wrong, but it doesn't mean the car is about to stop working or anything like that.

So don't panic if you see this code pop up on your scanner– take it easy and drive until you can get the issue fixed. 

And if you need help figuring out the problem, feel free to reach out to us for assistance. We're more than happy to help!