UDIAG A550

4.3" full-system scan tool with 40+ service functions

Model code: A550 Manufacturer: Udiag

📄 UDIAG A300 A500 A550 User Manual ↗

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Description

UDIAG A550 is an all-system handheld scan tool with a 4.3" colour screen (480x272) and hot keys, powered from the vehicle (8-18 V).

Coverage: 90-110+ US, European and Asian makes (1996-2025) with VIN identification. Functions: all OBDII protocols and 10 test modes (enhanced Mode 6), read/clear codes, freeze frame, live data in text and merged graphs, ECU information, active tests, adaptation, security access and coding, plus 40+ service functions (oil reset, ABS/EPB, airbag, DPF regeneration, IMMO, injector coding, battery configuration, TPMS, SAS and more). Reports can be printed via PC. Updates and printing use the TF card with a card reader and the UDIAG updater on a Windows PC.

Function availability depends on make, model and year. OEM dealer software and licences are not included.

Specifications

Product type	Device with pre-installed software (standalone)
OEM (Original Equipment Manufacturer) product? i	No
For which vehicle	Cars
Connection with computer / tablet / phone	USB
Other connection (details)	TF card + card reader (PC updater for updates and report printing)
Vehicle power supply system	12V
Supported protocols	K-line, KWP2000, SAE J1850, CAN, J1979
Months of free updates	24
Subscription model (description)	2 years of free online updates.
Menu language	English
Other language (details)	16-18 languages (UDIAG gives both numbers; list not published)
Warranty (months)	12
Warranty details (optional)	1-year hardware warranty (replacement for non-human damage)

Supported functions (45)

Actuation

Actuation / component test i (Active tests. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)

Advanced Diagnostics

O2 sensor data i (O2 sensor test (Mode 05).)
DTC lookup i (Built-in DTC library.)
Live data graphing i (Two parameters merged in one graph.)

Coding / adaptation

ECU coding i (Coding. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Adaptation (channels / values) i (Adaptation and security access. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)

Diagnostics

Reading the VIN i (VIN / vehicle information (Mode 09).)
Read fault codes (DTC) i (Generic engine / emission codes, incl. pending and permanent codes.)
Clear fault codes (DTC) i
Live data stream i
Freeze frame data i
Full system (all modules) scan i (All systems. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
I/M readiness monitors i
EVAP system test i (Component test / EVAP (OBD2 Mode 08), where supported by the vehicle.)
On-board monitor test (Mode 06) i
ECU information i (Calibration IDs (CAL ID / CVN).)

EV / hybrid

HV battery pack diagnostics i (HV battery (HVOLBAT). UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)

Key / immobilizer

Immobilizer reset / IMMO i (IMMO. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)

Programming

Mileage/odometer correction i (Odometer. Mileage functions may only be used to recalibrate a replacement or repaired instrument cluster to the true mileage. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)

Reports

Print / share i (Print reports via PC.)

Service reset

Oil / service / inspection reset i (Oil reset. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Electronic parking brake (EPB) service i (EPB. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Steering angle sensor (SAS) reset i (SAS. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Battery management (BMS) registration i (Battery registration (BRT). UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
DPF / FAP regeneration i (DPF / GPF regeneration. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Throttle body adaptation i (Throttle reset. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
TPMS reset / relearn i (TPMS / change tire. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
ABS brake bleeding i (ABS bleeding. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Gearbox / transmission adaptation i (AT adaptation, clutch, gearbox, gear learning, TCM oil. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
AdBlue / SCR reset i (AdBlue. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
EGR adaptation / reset i (EGR. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Injector coding i (Injector coding. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
NOx sensor reset / adaptation i (NOx sensor. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Airbag / SRS reset i (Airbag / SRS. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Headlight / AFS calibration i (AFS / headlight. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Start/stop system reset i (Stop/start. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Coolant system bleeding i (Coolant bleeding. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Transport mode on / off i (Transport mode. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Turbocharger / VGT adaptation i (Turbo. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
A/F (fuel mixture) adjustment i (A/F adjustment. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Sunroof initialization i (Sunroof reset. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Window / door calibration i (Windows / door. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Seat / occupant sensor calibration i (Seat match. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
Air suspension level calibration i (Suspension. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)
A/C compressor relearn i (A/C learn. UDIAG states 100+ supported makes without a public list – availability depends on make, model, year and installed control modules; check your VIN with UDIAG before buying.)

Conditions for specific vehicles (1)

Notes added by the manufacturer that apply only to the vehicles listed below — the function itself is supported.

Notes for specific vehicles (all functions)

Alpine (1)

Alpine
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Citroen (1)

Citroen
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Cupra (1)

Cupra
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

DS (1)

DS
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Dacia (1)

Dacia
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Daihatsu (1)

Daihatsu
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Lancia (1)

Lancia
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

MG (1)

MG
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Opel (1)

Opel
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Peugeot (1)

Peugeot
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Ravon (1)

Ravon
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Renault (1)

Renault
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Rover (1)

Rover
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

SEAT (1)

SEAT
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Skoda (1)

Skoda
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

SsangYong (1)

SsangYong
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Vauxhall (1)

Vauxhall
EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Compatibility disclosure

All-system diagnostics for 90–110+ makes (UDIAG gives different numbers) with active tests, adaptation, security access, coding and 40+ service functions. Functions in the UDIAG table without an exact match here (not entered per make): ENGPBM, MOTANG, PFP. Model years are not published by UDIAG; entries start at 1996 (EU-only makes 2001; diesel EOBD 2004). Function availability depends on make, model, year and installed control modules – check your VIN with UDIAG before buying. OEM dealer software and licences are not included.

Compatible vehicles (72 makes)

Check if it fits your vehicle:

Abarth (all models)

All models of this make (1996–…)

Acura (all models)

All models of this make (1996–…)

Alfa Romeo (all models)

All models of this make (1996–…)

Alpine (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Aston Martin (all models)

All models of this make (1996–…)

Audi (all models)

All models of this make (1996–…)

BMW (all models)

All models of this make (1996–…)

Bentley (all models)

All models of this make (1996–…)

Bugatti (all models)

All models of this make (1996–…)

Buick (all models)

All models of this make (1996–…)

Cadillac (all models)

All models of this make (1996–…)

Chevrolet (all models)

All models of this make (1996–…)

Chrysler (all models)

All models of this make (1996–…)

Citroen (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Cupra (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

DS (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Dacia (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Daewoo (all models)

All models of this make (1996–…)

Daihatsu (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Dodge (all models)

All models of this make (1996–…)

Ferrari (all models)

All models of this make (1996–…)

Fiat (all models)

All models of this make (1996–…)

Ford (all models)

All models of this make (1996–…)

GMC (all models)

All models of this make (1996–…)

Genesis (all models)

All models of this make (1996–…)

Honda (all models)

All models of this make (1996–…)

Hummer (all models)

All models of this make (1996–…)

Hyundai (all models)

All models of this make (1996–…)

Infiniti (all models)

All models of this make (1996–…)

Isuzu (all models)

All models of this make (1996–…)

Jaguar (all models)

All models of this make (1996–…)

Jeep (all models)

All models of this make (1996–…)

Kia (all models)

All models of this make (1996–…)

Lamborghini (all models)

All models of this make (1996–…)

Lancia (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Land Rover (all models)

All models of this make (1996–…)

Lexus (all models)

All models of this make (1996–…)

Lincoln (all models)

All models of this make (1996–…)

Lotus (all models)

All models of this make (1996–…)

MG (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Maserati (all models)

All models of this make (1996–…)

Mazda (all models)

All models of this make (1996–…)

McLaren (all models)

All models of this make (1996–…)

Mercedes-Benz (all models)

All models of this make (1996–…)

Mercury (all models)

All models of this make (1996–…)

Mini (all models)

All models of this make (1996–…)

Mitsubishi (all models)

All models of this make (1996–…)

Nissan (all models)

All models of this make (1996–…)

Oldsmobile (all models)

All models of this make (1996–…)

Opel (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Peugeot (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Plymouth (all models)

All models of this make (1996–…)

Pontiac (all models)

All models of this make (1996–…)

Porsche (all models)

All models of this make (1996–…)

RAM (all models)

All models of this make (1996–…)

Ravon (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Renault (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Rolls-Royce (all models)

All models of this make (1996–…)

Rover (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

SEAT (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Saab (all models)

All models of this make (1996–…)

Saturn (all models)

All models of this make (1996–…)

Scion (all models)

All models of this make (1996–…)

Skoda (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Smart (all models)

All models of this make (1996–…)

SsangYong (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Subaru (all models)

All models of this make (1996–…)

Suzuki (all models)

All models of this make (1996–…)

Toyota (all models)

All models of this make (1996–…)

Vauxhall (all models)

All models of this make (2001–…) ✎ EU-market vehicles: OBD2/EOBD from 2001 (petrol) and 2004 (diesel).

Volkswagen (all models)

All models of this make (1996–…)

Volvo (all models)

All models of this make (1996–…)

Where to buy

Udiagtech.com
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About the manufacturer: Udiag

UDIAG TECH CO., LTD. is an automotive diagnostic equipment manufacturer based in Shenzhen, China, with more than 13 years of experience in the automotive aftermarket. The company designs and sells OE-level diagnostic tablets (X-95 Pro, X-60, X-50), handheld scan tools (A-series, X-20 TPMS scanner, M200 motorcycle scanner), OBDII code readers (CR-series), TPMS tools, automotive oscilloscopes and ADAS calibration systems, as well as smoke leak detectors, video scopes and battery testers. UDIAG has a team of over 50 software engineers, invests more than 20% of annual revenue in R&D, serves customers in over 50 countries and regions, and its products carry ISO 9001, CE, FCC and RoHS certifications. Website: www.udiagtech.com

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UDIAG A550

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UDIAG A550

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UDIAG A550

Description

Specifications

Supported functions (45)

Actuation

Advanced Diagnostics

Coding / adaptation

Diagnostics

EV / hybrid

Key / immobilizer

Programming

Reports

Service reset

Notes for specific vehicles (all functions)

Compatibility disclosure

Compatible vehicles (72 makes)

Where to buy

About the manufacturer: Udiag

Device forum

General information about the device

Files and resources

Problems and troubleshooting

Updates and firmware

Diagnostic features

Accessories and compatibility

Instructions and tutorials

User opinions and experiences

Marketplace / buy-sell / spare parts

UDIAG A550

UDIAG A550

Description

Specifications

Supported functions (45)

Actuation

Advanced Diagnostics

Coding / adaptation

Diagnostics

EV / hybrid

Key / immobilizer

Programming

Reports

Service reset

Notes for specific vehicles (all functions)

Compatibility disclosure

Compatible vehicles (72 makes)

Where to buy

About the manufacturer: Udiag

Related devices

Device forum

UDIAG A550