P0201: Injector Circuit/Open - Cylinder 1
15 vehicles · 10 makes · $30-$5,000 repair
Most Reported On
P0201 is an OBD-II diagnostic trouble code meaning “Injector Circuit/Open - Cylinder 1.” P0201 means the engine computer detected an electrical problem in the wiring or control circuit for the fuel injector on cylinder 1. The PCM pulses each injector open and back ground, and when it sees an open circuit, a short, or abnormal resistance on cylinder 1's injector circuit, it sets this code. In practice it means cylinder 1 may not be getting fuel injected properly, which can cause a misfire, rough running, or a no-start on that cylinder. It points to the injector itself or its wiring, not to a fuel-pressure problem affecting the whole engine. This code is most commonly reported on 2010-2025 Mercedes-Benz Sprinter (Sprinter 1500, Sprinter 2500, Sprinter 3500, Sprinter 4500), 2017-2023 Ford Transit, and 2010-2015 Mercedes-Benz GLK-Class (GLK220 CDI, GLK250 BlueTEC), plus 12 other vehicles, with repair costs ranging from $30 to $5,000.
Common Causes
Typical Repair Cost
Based on 16 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0201, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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Vehicles Affected (15)
Fuel Injector Failure and Rough Running (EcoBlue Diesel)
7.3L IDI/Powerstroke Injector Failure
3.5L EcoBoost Fuel Injector Failure — Startup Misfire, Rough Idle, and Fuel-Injector DTCs
FAQ
What does P0201 mean?
P0201 stands for "Injector Circuit/Open - Cylinder 1." P0201 means the engine computer detected an electrical problem in the wiring or control circuit for the fuel injector on cylinder 1. The PCM pulses each injector open and back ground, and when it sees an open circuit, a short, or abnormal resistance on cylinder 1's injector circuit, it sets this code. In practice it means cylinder 1 may not be getting fuel injected properly, which can cause a misfire, rough running, or a no-start on that cylinder. It points to the injector itself or its wiring, not to a fuel-pressure problem affecting the whole engine.
What are the most common causes of P0201?
The most common causes of P0201 are: Damaged or corroded injector connector or terminals at cylinder 1, Broken, chafed, or shorted injector wiring harness, Failed (open or shorted) fuel injector on cylinder 1, Loose or poor ground/power feed to the injector circuit, Blown injector fuse or relay feeding the bank, Failed injector driver inside the PCM/ECM. The specific cause varies by vehicle.
How much does it cost to fix P0201?
Repair costs for P0201 range from $30 to $5,000, depending on the vehicle and root cause.
Which vehicles are affected by P0201?
Au7o has documented P0201 across 15 vehicle models from 10 manufacturers: Chevrolet, Chrysler, Dacia, Ford, GMC, Land Rover, Mercedes-Benz, SEAT, Skoda, Volkswagen.
Sources (12)
- ForumFord Transit USA Forum Thread: Fuel Injector Issues on 2.0L EcoBlue Diesel
- videoEricTheCarGuy - Diagnosing and Replacing Fuel Injectors on Ford Transit 2.0L EcoBlue Diesel
- mediaDuramax LML CP4 Pump Problems - Merchant Automotive
- mediaHow to Prevent LML CP4 Failure - Dirty Diesel Customs
- ForumCP4 failure - DuramaxForum
- videoHow to Diagnose and Replace 7.3L Powerstroke Injectors - EricTheCarGuy
- videoYouTube - ChrisFix: How to Clean Fuel Injectors on an Older Car
- articleP0201 on 2011-2020 Ford F-150 3.5L EcoBoost: Injector Circuit Causes and Fixes
- ForumEcoboost Misfire Solution! - Ford F150 Forum
- manufacturerOregon Fuel Injection: Chevrolet-GMC Diesel Diagnostics
- ForumSilveradoSierra: 6.6L Duramax Diesel blowing white smoke
- mediaChevy Trucks: The 3 Most Common Duramax L5P Engine Problems
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.