P020D Fault Code

P020D OBD-II Trouble Code Short Description

Cylinder 4 Injection Timing

What does trouble code P020D mean?

The P020D fault code is related to the fuel injector circuit in a car's engine. This code indicates a problem with the fuel injector that is responsible for delivering fuel to one or more cylinders of the engine.

There are many reasons why a P020D code may be triggered, including a faulty injector, damaged wiring, or a malfunctioning engine control module. In some cases, this code may be accompanied by other related codes such as P0200, P0201, P0202, P0203, P0204, or P0205.

To resolve this issue, the exact cause of the problem needs to be identified. This can be done through a diagnostic process that involves testing the fuel injector and its wiring, as well as the engine control module. Once the problem has been identified, the necessary repairs can be made, which may involve replacing the fuel injector or repairing any damaged wiring.

It is important to address this issue as quickly as possible, as a faulty fuel injector can lead to poor engine performance, reduced fuel efficiency, and potential engine damage over time.


What are the symptoms of the P020D code?

  • Reduced engine performance
  • Rough idle
  • Engine misfires
  • Stalling at idle or during acceleration
  • Hesitation or lack of power during acceleration
  • Increased fuel consumption
  • Check engine warning light illuminated on dashboard


What causes the P020D code?

The P020D fault code on cars is caused by an issue in the fuel injector circuit. This code indicates that there is a problem with Injector 4 Circuit/Open. This could be due to a faulty fuel injector, wiring issues in the circuit, or a malfunctioning control module. It is important to diagnose and repair the issue promptly to prevent further damage to the vehicle.

Possible Solutions

How to fix P020D?

The P020D fault code is a generic powertrain code that indicates a malfunction in the injector circuit of a particular cylinder. This type of fault usually occurs in petrol engines, and it is caused by a problem with the fuel injection system. When the computer detects a problem in the injector circuit, a P020D code is stored in the engine control module (ECM) memory, and the "Check Engine" light illuminates to alert the driver. In this article, we will discuss how to fix the P020D fault code in cars.

Check the Wiring

The most common cause of the P020D fault code is a problem with the wiring in the injector circuit. Check the wiring harness around the injector, paying particular attention to any damage, cracks, or breaks in the wiring. If there is any visible damage, repair or replace the wiring as necessary.

Check the Injector

If the wiring is not the issue, check the injector itself. Remove the injector and inspect it for any signs of damage or wear. Also, test the injector using an Ohmmeter to check the resistance of the injector. The resistance should be within the manufacturer's specifications. If the injector is faulty, replace it.

Check the Fuel Pressure

Another possible cause of the P020D fault code is low fuel pressure. Use a fuel pressure gauge to check the fuel pressure of the fuel rail. If the fuel pressure is low, replace the fuel pump or the fuel pressure regulator as necessary.

Check the ECM

If the above steps do not solve the problem, the ECM may be faulty. You can try resetting the engine control module by disconnecting the battery for a few minutes. If the code resurfaces, you may need to replace the ECM.


The P020D fault code should not be ignored, as it can potentially damage the engine. If you notice that the "Check Engine" light is illuminated, take your car to a qualified mechanic to diagnose and fix the problem. By following the steps outlined in this article, you can troubleshoot and solve the P020D fault code in your car.