Has a warning light come on on your dashboard? Instead of guessing or heading straight to the garage, you can quickly find out the problem yourself with an OBD2 Fault Code Reader. It's a smart, affordable tool that every car owner should have.
At Felkodslasare.se, you'll find a wide range of professional and user-friendly OBD2 readers, carefully selected for both beginners and experts.
What is an OBD2 Fault Code Reader?
An OBD2 Fault Code Reader (On-Board Diagnostics) is a digital tool that connects to the car's diagnostic port. It is used to:
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Read out fault codes (DTC) from the car's control units
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Clear warning lights
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Perform tests and display sensor data in real-time
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Troubleshoot systems such as engine, ABS, SRS, DPF, and more
Since 2001 (petrol) and 2004 (diesel), an OBD2 port is mandatory in all cars within the EU.
How does an OBD2 Fault Code Reader work?
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Connects directly to the car's OBD2 port (often under the steering wheel)
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Communicates with the car's ECU (Engine Control Unit)
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Displays fault codes in a standardized format (P, B, C, U)
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The user can then fix or reset faults themselves or with workshop assistance
Some models use Bluetooth or Wi-Fi to communicate with a mobile app.
Why you should have a fault code reader at home
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💰 Save money by identifying faults yourself
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⏱️ Quick diagnostics before inspection or longer drives
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🧠 Better understanding of your car's systems
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🔄 Ability to reset warning lights and service intervals
It is a must for car owners who want control and peace of mind.
Fault Code Readers from Felkodslasare.se
At Felkodslasare.se you will find:
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✅ Simple OBD2 readers for hobby users
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✅ Advanced models with support for more systems
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✅ Wireless Bluetooth and Wi-Fi devices
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✅ Support for multiple car brands and models
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✅ Fast delivery and knowledgeable customer service
They offer clear product information and help you choose the right model for your car.
Simple vs Advanced Fault Code Reader
| Type |
Functions |
| Simple |
Read/clear fault codes, engine data |
| Medium |
Live data, service reset, O2 sensor tests |
| Advanced |
DPF regeneration, ABS/SRS diagnosis, coding (on some models) |
No matter what your level, there is a model for you at Felkodslasare.se.
Compatibility and Support for Car Brands
All readers from Felkodslasare.se are compatible with the OBD2 standard and work with:
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🇸🇪 Swedish cars (Volvo, Saab)
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🇩🇪 German cars (BMW, Mercedes, Audi, VW)
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🇯🇵 Japanese brands (Toyota, Nissan, Mazda, Honda)
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🇺🇸 American brands (Ford, Jeep, Dodge)
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🚙 As well as the majority of cars sold in the EU after 2001/2004
Wireless vs Wired Fault Code Reader
| Type |
Advantages |
Disadvantages |
| Wired |
Stable connection, no battery required |
Less flexible, screen may be small |
| Bluetooth/Wi-Fi |
Used via mobile app, wireless convenience |
Requires app installation, sometimes limited compatibility |
At Felkodslasare.se, both types are available – choose what best suits your user style and technical level.
Recommended Models at Felkodslasare.se
Among the best-selling OBD2 fault code readers, you will find:
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ThinkDiag – compact Bluetooth reader with app for both beginners and pros
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iCarSoft EU Pro+ – specialized for European cars with more systems
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Autel AL519/ML629 – wired reader with color screen and fast code reading
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ELM327 adapters – budget-friendly, compatible with many apps
Each model is tested and selected by experts at Felkodslasare.se.
Interpreting Fault Codes (DTC)
Fault codes usually come in a format like:
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P0xxx – Engine/exhaust system
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B0xxx – Body and comfort systems
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C0xxx – Chassis, ABS, steering
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U0xxx – Communication faults between control units
Some readers also show explanations directly on the display; otherwise, code lists are available online or via app.
Common Extra Features
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🔁 Service reset
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🔋 Battery diagnosis
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💨 DPF regeneration for diesel cars
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🔧 O2 sensor and evap test
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📊 Live data for real-time monitoring
Advanced devices can also save data or print reports via computer.
Tips for New Users
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Read the car's manual or vehicle-specific guide before use
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Avoid clearing fault codes without first noting them
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Start with a simple model and upgrade if needed
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Have the car in "ignition on" mode when connecting
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Ask questions to Felkodslasare.se's support – they are happy to help
Frequently Asked Questions about OBD2 Fault Code Readers
Is the tool in Swedish?
Yes, many models have a Swedish menu system or multilingual support.
Can I use one reader on multiple cars?
Yes – as long as the cars are OBD2-compatible.
Do I need to update the software?
Some models have free updates via PC or app. Check the product description.
Customer Reviews from Felkodslasare.se
"Cleared the engine light on my Volvo V70 in 5 minutes. Superb!"
– Tobias, Gävle
"ThinkDiag is incredibly convenient with the mobile. Highly recommended!"
– Anna, Borås
"Great support and fast delivery. My iCarSoft works perfectly on BMW and Audi."
– Daniel, Kalmar
Conclusion – Why an OBD2 Fault Code Reader from Felkodslasare.se is a Smart Investment
An OBD2 fault code reader gives you control, saves you money, and increases your understanding of your car. It is an invaluable aid for error messages, servicing, and regular checks.
At Felkodslasare.se, you get:
✅ A wide range of tested and approved models
✅ Genuine products with warranty and support
✅ Fast delivery within Sweden
✅ Help to choose the right model for your car and your needs
Empower yourself to understand your car – with the help of Felkodslasare.se!
