P0205 serious

Injector Circuit Malfunction - Cylinder 5

What does P0205 mean?

The P0205 code means the vehicle's onboard diagnostic system has detected: Injector Circuit Malfunction - Cylinder 5. This is a serious severity code.

Common Symptoms

  • Check Engine Light on
  • Cylinder 5 misfire
  • Rough idle especially on V6 or V8
  • Power loss
  • Fuel odor

Probable Causes (Ranked by Likelihood)

  • Wiring fault at cylinder 5 injector Very High
  • Failed cylinder 5 injector High
  • Corroded connector at injector 5 High
  • PCM driver fault for cylinder 5 Moderate

Step-by-Step Diagnostic Procedure

  1. Locate cylinder 5 on your engine layout (varies by manufacturer).

  2. NOID light test.

  3. Injector resistance check (11-17 ohms for high-impedance).

  4. Wiring harness inspection, particularly near heat sources.

Frequently Asked Questions

Where is cylinder 5 on a V6 or V8?

On a V8, cylinder 5 is typically the first cylinder on the passenger-side bank (Bank 2, front). On a V6, location varies. Always consult a firing order diagram for your specific engine rather than guessing.

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