P021E Fault Code

P021E OBD-II Trouble Code Short Description

Cylinder 11 Injection Timing

What does trouble code P021E mean?

The P021E fault code is a diagnostic trouble code (DTC) that is related to the fuel injection system in a car. It is typically accompanied by other codes related to the fuel system, such as P025A or P030B, and is most commonly found in diesel engines.

The P021E code indicates that the fuel injection system is experiencing high pressure levels, which can cause a variety of issues. These may include rough idling, poor acceleration, and reduced fuel efficiency. The high pressure can also cause damage to other engine components, such as the fuel pump or fuel injectors.

The solution to the P021E code will depend on the underlying cause. It may be as simple as replacing a faulty fuel filter or fuel pressure regulator, or it may involve more complex repairs such as replacing the fuel injectors or fuel pump.

To diagnose the cause of the P021E code, a mechanic will typically use diagnostic tools to monitor the engine's performance, including fuel pressure levels and injector performance. They may also perform a visual inspection of the fuel system to look for signs of damage or wear.

Overall, the P021E code is an important indicator of potential issues with a car's fuel injection system. Addressing the underlying cause of the code quickly can help prevent further damage and ensure the engine continues to run smoothly.


What are the symptoms of the P021E code?

  • Check engine light may turn on
  • Decreased engine performance and power
  • Engine may stall or hesitate
  • Rough or uneven idling
  • Increased fuel consumption
  • Transmission shifting issues, such as hard or delayed shifting
  • Poor acceleration or response to throttle inputs.


What causes the P021E code?

The P021E fault code in cars is related to the fuel injector circuit. It is usually caused by a faulty fuel injector control module or a malfunctioning fuel injector driver circuit. This can be due to a variety of reasons such as corrosion, wiring issues, or damaged components.

Some common symptoms associated with this fault code include reduced engine power, difficulty starting the engine, rough idling, and reduced fuel efficiency. If left unchecked, it can lead to severe engine damage and potentially cause the vehicle to stall.

To diagnose and repair this issue, it is recommended to take the car to an experienced mechanic or dealership who can properly diagnose the problem using specialized equipment and tools. They may need to replace faulty components or repair damaged wiring to fix the problem.

Possible Solutions

How to fix P021E?

If your car is displaying the P021E fault code, it indicates a problem with the fuel pump.

Here are some steps you can take to fix the issue:

  1. Check the fuel system for any damage or leaks. This may include the fuel lines, fuel pump, fuel filter, and fuel injectors.

  2. Inspect the fuel pump control module for any damage or malfunctions. If necessary, replace the module with a new one.

  3. Check the fuel pump relay for proper function. If necessary, replace the relay with a new one.

  4. Inspect the fuel pressure sensor for any malfunction. Replace the sensor if needed.

  5. Reset the fault code using an OBD-II scanner. This will clear the code from the car's memory and reset the check engine light.

If these steps don't resolve the P021E fault code, it's best to bring your car to a mechanic for proper diagnosis and repair.