P1000 Code – Meaning, Causes, Symptoms (& How To Fix)

A guide explaining what the P1000 code is and how to fix a car with this code. Includes symptoms for reference as well as tips on how to fix it.

P1000 Trouble Code

You are driving down the road and the Check Engine Light comes on, now what? If you run a scan with your OBDII tool, you might end up with the P1000 code that can help you get to the bottom of the problem. 

In this guide, we evaluate what the P1000 code means. We also look at the causes of it, evaluate the symptoms and show you some ways to fix it. 

Code Definition

  • P1000 (Ford) – OBDII Monitor Testing Not Complete 
  • P1000 (KIA) – System diagnosis incomplete
  • P1000 (Jaguar) – System readiness test not complete 
  • P1000 (Mazda) – OBDII Drive Cycle Malfunction
  • P1000 (Land Rover) – Engine control module (ECM) memory erased – no codes stored 

What Does the P1000 Code Mean?

Code P1000 is manufacturer-specific, but means the same thing across the board. With Ford and Jaguar vehicles, the OBDII monitor testing didn’t complete. Mazda states that it is an OBDII drive cycle malfunction. With every model, the code indicates that the system wasn’t able to do a full diagnostic check. 

Trouble code P1000 shows that the onboard diagnostic system is unable to complete its standard type of readiness checks. These checks occur before startup to determine if any faults are present. If there are active faults, they are stored in the system while the Check Engine Light comes on to alert you. 

It’s when the light comes on without a normal fault that P1000 occurs. This simply indicates that the system couldn’t determine if there were faults because the check wasn’t completed. 

P1000 Trouble Code Symptoms

In the overwhelming majority of cases, the P1000 trouble code will not exhibit any other symptoms. It is asymptomatic, aside from the Check Engine Light coming on. Unless there are other problems with the vehicle, you shouldn’t notice other symptoms.

Here’s the list of what might occur:

Causes of the P1000 Code

There aren’t many possible causes of the P1000 code. In many cases, it just has to do with a disconnection or clearing the codes before they are resolved. 

Here are the most common causes:

  • Battery has been disconnected
  • PCM (Powertrain Control Module) has been disconnected
  • OBDII monitor failure happened before the drive cycle completion
  • DTCs were deleted before the codes were resolved

How Serious is the P1000 Code?

Low – It’s unlikely that you are experiencing any problems if this is the only code that was set. In fact, it could resolve itself the next time the system does a check. If the code doesn’t go away on its own, you want to have the system looked at.

If there are other trouble codes present, these should help you determine the problem and severity. Have your vehicle looked at before larger problems exist. 

What Repairs Can Fix the P1000 Code?

It’s unlikely that you need to do anything to repair the P1000 code. It should turn itself off the next time that the vehicle goes through the diagnostic check.

However, here are a few fixes to consider:

  • Run through drive cycle to get code to shut off
  • If there are other codes present, repair these

Common P1000 Diagnosis Mistakes

Because this is a manufacturer-specific code, you must reference the procedures and tips for your particular make. The steps to turn off the light could be different for a Ford vs. Jaguar. You can find these steps in your car’s service manual.

Additionally, it’s important to determine if other codes are present. If so, you want to resolve these codes before attempting to get this one erased. 

How to Diagnose the P1000 Trouble Code

Professional mechanics will follow a few simple steps to remove the P1000 trouble code. It doesn’t take a lot of time or effort. 

Here are the steps to attempt:

  1. With your code scanner, download and read freeze frame data to see if there are any other problems.
  2. If there are other codes, you need to resolve these first.
  3. Clear the other codes and start the drive cycle, as set out by the car manufacturer. For some Ford vehicles, the drive cycle consists of starting the car, idling the engine for several minutes and driving for a specified amount of time. You will need to maintain a specific speed for a pre-determined amount of time, so follow the instructions given to you. 
  4. If the code goes off, you have nothing else to do. If the code remains, you might need to do some advanced diagnostics. 

Estimated Cost of Repair

To repair the P1000 trouble code, you shouldn’t need to spend any money, unless you need help from a professional shop. In most cases, you can get the code resolved by simply running the vehicle through a drive cycle. 

This doesn’t cost you any money but does take a small amount of time. You also must get the proper drive cycle procedure for your vehicle type. 

Mechanics Tips about the P1000 Code

There are several codes that can show in conjunction with the P1000 code. If you see any of these, you need to apply the proper repair and the P1000 code should go away on its own.

  • P0171 – System Too Lean (Bank 1)
  • P0174 – System Too Lean (Bank 2)
  • P1001 – Key on Engine Running (KOER) Not Able to Complete, KOER Aborted
  • P1101 – Mass Air Flow (MAF) Sensor Out of Self-Test Range
  • P1299 – Cylinder Head Over Temperature Protection Active
  • P1405 – Differential Pressure Feedback Sensor Upstream Hose Off or Plugged
  • P1639 – Vehicle ID Block Corrupted or Not Programmed