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?
- Limited driving only
- DIY difficulty
- medium
- Estimated cost
- $25-$400
Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.
Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.
Affiliate links — we earn a commission at no extra cost to you.
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
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.
Mechanics Guide Step-by-step diagnosis
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.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
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:
Commonly Affected Vehicles
- Ford F-150 (4.6L and 5.4L V8/V6)
- GM 4.3L V6 and 5.3L V8
- Dodge RAM 5.7L HEMI
- Toyota Tundra 4.7L V8
- Jeep Grand Cherokee 4.7L
Related Codes
Explore More
Was this helpful?
Send this to whoever is fixing the car — your mechanic, or the person asking what the light means.