P0205 – OBD-II DTC

OBD-II DTC P0205 – Injector Circuit Malfunction – Cylinder 4

DTC P0205 meaning

DTC P0205 refers to a malfunction in the injector circuit for cylinder 4. This diagnostic trouble code indicates that the Engine Control Module (ECM) has detected an issue with the electrical circuit that controls the fuel injector for the fourth cylinder. The problem could stem from various sources, including wiring issues, injector faults, or ECM malfunctions.

DTC P0205 symptoms

Common symptoms associated with DTC P0205 may include:

• Engine misfire or rough idle
• Decreased engine performance
• Increased fuel consumption
• Check Engine Light (CEL) illuminated
• Difficulty starting the engine

DTC P0205 causes

Several factors can lead to the occurrence of DTC P0205, including:

• Faulty fuel injector for cylinder 4
• Open or short circuit in the injector wiring
• Corroded or damaged connectors
• Faulty Engine Control Module (ECM)
• Issues with the fuel supply system

DTC P0205 seriousness

DTC P0205 is considered a serious issue as it can lead to engine performance problems and increased emissions. If left unaddressed, it may cause further damage to the engine or other components, potentially leading to costly repairs. It is advisable to diagnose and resolve this code promptly to maintain vehicle performance and reliability.

How to diagnose DTC P0205

To diagnose DTC P0205, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P0205 code.
2. Inspect the wiring and connectors for cylinder 4’s injector for any visible damage or corrosion.
3. Test the fuel injector for cylinder 4 using a multimeter to check for proper resistance.
4. Check the injector pulse using a noid light to ensure the ECM is sending the correct signal.
5. Inspect the ECM for any faults or issues that may affect injector operation.

How to fix DTC P0205 step-by-step instructions

To fix DTC P0205, follow these steps:

1. Repair or replace any damaged wiring or connectors related to the injector circuit for cylinder 4.
2. If the fuel injector is faulty, replace it with a new or refurbished unit.
3. Ensure that the ECM is functioning correctly if necessary, reprogram or replace it.
4. Clear the DTC using an OBD-II scanner after repairs are made.
5. Test drive the vehicle to ensure the issue is resolved and the check engine light does not reappear.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.