Vehicle Diagnostic Service
Cartronics are vehicle diagnostic specialists. We use the latest diagnostic equipment and over 70 year’s of engineering experience to accurately identify the problem with your vehicle’s ECU[s].
We do not blindly fit parts into vehicles without understanding the actual cause, saving our customers time and money.
We are located in Surrey, just outside London.
Diagnostic Dealer Tools
Cartronics use official factory dealer diagnostic tools and have full access to specialised wiring diagrams and workshop manuals for all vehicles.
We utilise a vast range of the latest tools, scanners and car diagnostic systems to assist our Engineers in locating and fixing the vehicle and never use Chinese copy-cat programs or fake software from the internet as these can seriously damage the vehicle.
Most cars manufactured in the last 15 years have complex ECU (Electronic Control Units) that require software and firmware updates in order to improve and even fix known issues. In turn, this may have a knock-on effect on the car’s other electronic components.
Cartronics can update and code ECU’s on all major car makes. This may be required if a used or even new part is installed or in the event of a fault.

Diagnostic Questions
Car diagnostics is the skill of finding, and rectifying, faults within a vehicle’s computer system (ECU). These faults can produce error codes that can only be read by specialist diagnostic equipment and fixed by our auto electrical engineers.
Yes! Our diagnostic service ensures we pinpoint the problem with your vehicle, first time. We do not guess or replace random parts simply hoping for the best. This saves our customers’ time and money by avoiding redundant repairs and replacements.
Yes. Cartronics have a long history with diagnosing and repairing vehicles for mechanics, garages and car sale garages. We welcome any challenge so if you are a professional who wants to avoid redundant repairs and excessive dealership prices, get in touch.
- Contact us and make an appointment
- Bring your vehicle to us at our workshop
- We will perform our Diagnostic Service £95*
- We will prepare a quote for the cost of repair
- You may choose whether or not you wish to proceed
*Subject to T&C’s. Prices will ALWAYS be confirmed before work begins.

We can diagnose and repair all cars including:
Alfa Romeo
Aston Martin
Audi
Bentley
BMW
Chevrolet
Chrysler
Citroen
Ferrari
Fiat
Ford
Honda
Hyundai
Infiniti
Iveco
Jaguar
Jeep
Kia
Lamborghini
Land Rover
Lexus
Lotus
Maserati
Mazda
Mercedes Benz
Mini
Mitsubishi
Nissan
Peugeot
Porsche
Renault
Rolls Royce
Saab
Seat
Skoda
Smart
Suburu
Suzuki
Toyota
Vauxhall
Volkswagen
Volvo
We can diagnose and repair all cars including:
Alfa Romeo
Aston Martin
Audi
Bentley
BMW
Chevrolet
Chrysler
Citroen
Ferrari
Fiat
Ford
Honda
Hyundai
Infiniti
Iveco
Jaguar
Jeep
Kia
Nissan
Peugeot
Porsche
Renault
Rolls Royce
Saab
Seat
Skoda
Smart
Lamborghini
Land Rover
Lexus
Lotus
Maserati
Mazda
Mercedes Benz
Mini
Mitsubishi
Suburu
Suzuki
Toyota
Vauxhall
Volkswagen
Volvo