P0205: How to Diagnose & Fix — Injector Circuit/Open - Cylinder 5
7 vehicles · 5 makes · $30-$6,500 repair
How to diagnose and fix P0205: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Ford Transit · 2017–2023
The 2017-2023 Ford Transit with the 2.0L EcoBlue diesel engine (available in some markets) and the 3.5L EcoBoost V6 experience fuel injector failures causing rough running, misfires, poor idle, reduced performance, and excessive smoke on cold start. Parkers UK documents an official Ford service action for Transit EcoBlue diesel injector failures traced to a quality issue with Continental-supplied injectors where an internal surface coating comes unstuck, blocking the injector. FordTransitUSAForum.com documents injector failure on 3.5L EcoBoost Transit models as well, where direct injection fuel deposits cause injector spray pattern degradation. RepairPal estimates individual injector replacement between $266 and $627 depending on Transit model, but multiple injectors often need replacement simultaneously, and contaminated fuel systems can cost significantly more.
Common Symptoms
- Rough running and engine misfires
- Poor idle quality
- Excessive blue or black smoke on cold start
- Reduced engine performance and power
- Check engine light with injector or misfire codes
- Engine stalls immediately after starting
- High fuel consumption
- Engine hesitation under acceleration
How to Fix
For Transit 3.5L EcoBoost: replace failed injectors ($100-200 per injector, 3-4 hours labor). Consider replacing all 6 injectors if the vehicle has over 100k miles - if one has failed, others are likely close behind. For EcoBlue diesel: Ford issued a service action for Continental injector failures - check with dealer for coverage. Use only Top Tier gasoline and change fuel filters per schedule. Professional fuel system cleaning every 50,000 miles can extend injector life.
Sources for this issue (1)
Audi R8 · 2008–2023
The FSI direct-injection injectors shared across the VAG family (Audi/VW/Porsche) are a documented R8 failure point. Injectors can stick open or closed; a stuck-open injector dumps raw fuel into the cylinder and can wash down the bore, while a stuck-closed injector starves the cylinder. One well-known r8talk case had 6 of 8 injectors fail on a 2008 V8 at only 14,000 miles. Symptoms overlap with coil failure (misfires), so proper diagnosis is important, and carbon buildup on the injector tips is a contributing factor.
Common Symptoms
- Persistent cylinder misfire after coil replacement
- Rough running and reduced power
- Hard starting or stalling after start
- Fuel smell or fuel-trim faults
- Check-engine light
How to Fix
Confirm the failing cylinder with misfire and fuel-trim data and, where possible, injector-specific fault codes rather than replacing coils blindly. Replace the failed injector(s) with OEM FSI units; many owners replace as a bank or full set given shared age and mileage, and clean or address intake-valve carbon at the same service. Expect roughly $2,900 for a multi-injector job including labor per owner reports.
Sources for this issue (1)
Chevrolet Silverado 2500HD · 2001–2016
The fuel injector wiring harness on the Duramax diesel routes across the top of the engine under the valve covers. The harness rubs against the valve cover and rocker arms, causing the insulation to wear through and the wires to short or open. When an injector wire is damaged, the affected cylinder misfires, the engine runs rough, and white smoke pours from the exhaust. The chafing is accelerated by engine vibration and can affect multiple cylinders over time. GM released updated harness routing clips but the fundamental design has the harness in a high-wear location.
Common Symptoms
- Engine misfires on one or more cylinders
- White smoke from exhaust
- Rough idle that develops gradually
- Check engine light with injector circuit codes
- Engine runs on fewer than 8 cylinders
- Intermittent misfires that come and go
How to Fix
Remove the valve covers and inspect the injector harness for chafing (requires 2-3 hours labor). Damaged sections can be repaired with heat-shrink tubing and solder ($100-$300 for repair). If the harness is severely damaged in multiple places, a complete replacement harness costs $200-$500 and takes 3-5 hours to install. Add additional harness routing clips and protective loom to prevent recurrence. Some diesel specialists reroute the harness outside the valve cover (external harness conversion) to eliminate the chafing issue permanently.
Sources for this issue (1)
Land Rover Defender · 1999–2006
GMC Sierra 3500HD · 2015–2024
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P0205 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0205 mean?
P0205 stands for "Injector Circuit/Open - Cylinder 5." P0205 is a fuel-system code meaning the engine computer detected an electrical problem (an open circuit or out-of-range condition) in the fuel injector circuit for cylinder number 5. The PCM controls each injector with a precise electrical pulse, and it monitors that circuit for proper current flow. When the cylinder 5 injector circuit doesn't respond as expected — typically an open or a wiring fault — this code sets. It generally causes a misfire on that cylinder, rough idle, hesitation, reduced power, and possibly hard starting, since cylinder 5 isn't being fueled correctly.
What are the most common causes of P0205?
The most common causes of P0205 are: Failed or open fuel injector on cylinder 5, Open or shorted wiring in the injector control circuit, Corroded, loose, or damaged injector connector, Poor power feed or driver fault from the PCM/injector circuit, Chafed or broken injector harness, Blown fuse feeding the injector bank (where applicable), PCM injector driver failure (less common). The specific cause varies by vehicle.
How much does it cost to fix P0205?
Repair costs for P0205 range from $30 to $6,500, depending on the vehicle and root cause.
Which vehicles are affected by P0205?
Au7o has documented P0205 across 7 vehicle models from 5 manufacturers: Audi, Chevrolet, Ford, GMC, Land Rover.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.