TOPDON CarPal-A Bluetooth OBD2 Diagnostic Scanner

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Product guide

TOPDON CarPal-A Bluetooth OBD2 Diagnostic Scanner

TOPDON CarPal-A is a Bluetooth OBD2 diagnostic scanner that pairs with an iOS or Android phone for fault-code checks, live data and selected maintenance resets. Its phone-based format suits drivers who want to investigate vehicle warnings and review diagnostic information without a built-in screen.

At a glance

Reads and clears fault codes across vehicle systems, with fault severity indications and code-specific repair guidance claimed.
Includes six named reset services: oil, TPMS, BMS, EPB, throttle adaptation and DPF regeneration.
Phone app presentation includes live data as graphs, numerical values and gauges, plus saved data playback and reports.
Bluetooth connection avoids a cable between the scanner and phone, the manufacturer states a range of up to 33ft/10m.

Price

£34.92Save 24%

Reference price: ~~£45.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Six maintenance reset functions go beyond basic engine-code reading, if supported by the vehicle.
Live-data graphs and recorded reports can help users review changes over time.
AutoVIN and in-app repair guidance may reduce manual lookup when beginning a diagnostic check.

Cons

Requires a compatible smartphone and app rather than providing a standalone screen.
The listing warns that 32-bit phones are not supported.

Technical specifications

8 specifications

Identity
Brand	TOPDON
Model	CarPal-A

Power and battery
Power configuration	Battery Powered

Dimensions and installation
Dimensions listed	5.1L x 2.5W x 8.4H centimetres

Phone compatibility and connection
Operating systems	iOS and Android
Bluetooth version	Bluetooth 5.0 technology
Wireless range claimed	up to 33ft/10m
Minimum operating system versions	Android 7.0 or above and iOS 11.0 or above

What to know before buying

Compatibility depends on the vehicle and phone, the listing advises checking vehicle support before purchase. Customer feedback is mixed on Bluetooth setup and diagnostic accuracy, so treat app readings as a starting point and confirm uncertain faults appropriately.

What’s in the box

Included

CarPal (1)
Quick Start Guide (1)

Who is it for?

A good fit for

Drivers who want phone-based code reading, live-data views and maintenance resets for a compatible vehicle.
DIY users who want to investigate warning lights and consult in-app fault-code guidance before deciding on next steps.

Less suited to

Buyers who need a standalone handheld scanner with its own display.
Users who need diagnostic results guaranteed as a substitute for professional assessment.

TOPDON CarPal-A Bluetooth OBD2 Diagnostic Scanner · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 3,204 ratings

5 stars72%72%
4 stars14%14%
3 stars6%6%
2 stars2%2%
1 star6%6%

Customer feedback is generally favourable, with a 4.4 out of 5 rating across 3,204 ratings, 72% are five-star and 6% are one-star. The supplied feedback mentions ease of app navigation and fault identification, while Bluetooth setup and accuracy draw mixed reactions. For buyers using its supported phone connection and diagnostic functions, these comments suggest usability can be a plus but connection and interpretation may not be consistent, ratings alone do not establish why individual users scored it as they did.

Positive themes

Customers mention ease of use and app navigation.
Customers report that it can identify faults.

Mixed feedback

Bluetooth connectivity is described as easy by some but fiddly to set up by others.
Reported diagnostic accuracy is mixed, with some feedback describing results as misleading.

Frequently asked questions

Which phones does the CarPal-A support?

The listing specifies iOS and Android, with Android 7.0 or above and iOS 11.0 or above. It also states that 32-bit phones are not supported.

Which maintenance resets are listed?

The six named functions are Oil Reset, TPMS Reset, BMS Reset, EPB Reset, Throttle Adaptation and DPF Regeneration. Availability can depend on the vehicle.

Does the CarPal-A have a built-in display?

The listing describes it as a Bluetooth device used with a phone app, it does not list a built-in screen.

What is included?

The stated package contents are one CarPal and one Quick Start Guide.