P0205 Fault Code

P0205 OBD-II Trouble Code Short Description

Cylinder 5 Injector Circuit Malfunction

What does trouble code P0205 mean?

The P0205 fault code is a diagnostic trouble code (DTC) that indicates an issue with the fuel injector circuit in the fifth cylinder of a vehicle's engine. This code is specific to cars with multi-port fuel-injection systems.

Possible causes of a P0205 code include a faulty fuel injector, a wiring issue in the injector circuit, a failed fuel injector control module, or a problem with the powertrain control module (PCM).

To diagnose and fix the issue, the first step is to check the wiring and connectors in the fuel injector circuit, as this is often the root of the problem. If this does not solve the issue, the fuel injector itself may need to be replaced. It's important to resolve the issue quickly as a malfunctioning fuel injector can cause engine misfires, reduced fuel efficiency, and other performance issues.

Overall, a P0205 code should be addressed promptly to ensure proper vehicle operation and prevent further damage to the engine.


What are the symptoms of the P0205 code?

P0205 is a generic OBD-II diagnostic trouble code that indicates a fault with the fuel injector circuit for cylinder 5. Symptoms of P0205 fault code may include:

  1. Rough idle: The engine may shake or vibrate abnormally when idling due to misfire caused by uneven fuel injection.

  2. Poor performance: The engine may struggle to accelerate or lack power, causing reduced performance.

  3. Increased fuel consumption: Due to inefficiency or incomplete combustion in the engine, P0205 may cause increased fuel consumption, which can lead to higher running costs.

  4. Engine runs rough: Uneven fuel injection can cause the engine to run rough, especially when under load.

  5. Check Engine Light: P0205 fault code will trigger the check engine light to illuminate on the dashboard instrument cluster.


What causes the P0205 code?

P0205 is a diagnostic trouble code (DTC) that occurs when the Engine Control Module (ECM) detects a fault in the fuel injector circuit for cylinder 5. This code is commonly found in vehicles with multi-cylinder engines, particularly those with electronic fuel injection.

Some of the common causes for P0205 fault code on cars include:

  1. Failed fuel injector: A failed or clogged fuel injector can cause the ECM to detect problems in the fuel injector circuit, which can trigger the P0205 code.

  2. Wiring issues: Faulty or damaged wiring in the fuel injector circuit can cause electrical resistance, which can lead to a malfunction in the fuel injector circuit.

  3. Faulty ECM: In rare cases, a faulty ECM can detect a problem in the fuel injector circuit and may trigger the P0205 code.

  4. Failed spark plug or coil: A failed spark plug or coil on cylinder 5 can cause the engine to miss, which can cause the ECM to detect a problem in the fuel injector circuit.

  5. Other issues: Other issues such as a faulty fuel pump, low fuel pressure, or a clogged fuel filter can lead to a P0205 code on cars.

If you are experiencing issues with the fuel injector circuit, it is recommended that you take your vehicle for diagnosis and repair by a professional mechanic to avoid further complications.

Possible Solutions

How to fix P0205?

If you have a vehicle with an engine control module (ECM) or powertrain control module (PCM) that's throwing a P0205 fault code, you may be experiencing one or more of the following issues:

  • Rough running engine
  • Misfiring engine
  • Engine stalling
  • Poor fuel economy
  • Check engine light is on

Here are some steps you can take to fix the P0205 fault code on your car:

  1. Check the wiring and connections: The P0205 code is related to the fuel injector circuit for cylinder 5. You'll need to inspect the wiring and connections from the fuel injector to the ECM/PCM to see if there are any damaged wires or poor connections. If you find any issues with the wiring or connections, repair or replace them as necessary.

  2. Test the fuel injector: You can use a multimeter or test light to check the resistance of the fuel injector. A resistance reading outside of the manufacturer's specifications could indicate a faulty injector. You can also use a noid light to see if the injector is receiving a signal from the ECM/PCM.

  3. Check the fuel pressure: Low fuel pressure could cause a P0205 fault code. Use a fuel pressure gauge to test the fuel pressure at the fuel rail. If the fuel pressure is outside of the manufacturer's specifications, you may need to replace the fuel pump or fuel pressure regulator.

  4. Clean or replace the fuel injector: If the fuel injector is clogged or damaged, it may need to be cleaned or replaced. You can try using a fuel injector cleaner or removing the injector and cleaning it manually. If cleaning doesn't work, you may need to replace the injector.

  5. Test the ECM/PCM: If all else fails, it's possible that the ECM/PCM itself is faulty. You can use a scan tool to test the ECM/PCM and see if it's sending the correct signals to the fuel injector.

By following these steps, you can diagnose and fix the P0205 fault code on your car and get your engine running smoothly again.