Injector Circuit Malfunction - Cylinder 5
The P0205 code means the vehicle's onboard diagnostic system has detected: Injector Circuit Malfunction - Cylinder 5. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- medium
- Estimated cost
- $25-$400
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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
-
Locate cylinder 5 on your engine layout (varies by manufacturer).
-
NOID light test.
-
Injector resistance check (11-17 ohms for high-impedance).
-
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.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0205 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
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