They can also read PIDs and aid in diagnostics.

These devices represent a low-cost way for DIYers and seasoned techs alike to tackle computer diagnostics.

These cloned chips often exhibit strange behaviors, but even legitimate hardware fails to work with certain devices.

An electronic diagram of a brain with speedometers in the brain

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The primary exceptions include Apple iOS products such as the iPhone, iPad, and iPod touch.

TheseiOS devices typically don’t work with ELM327 scannersdue to the way that Apple handles the Bluetooth stack.

In some cases, other smartphones can have issues pairing with certain ELM327 Bluetooth scanners.

This is typically due to problems with unauthorized, cloned microcontrollers that don’t have an up-to-date code.

The most common steps are:

Plug the ELM327 Bluetooth machine into the OBD-II port.

Set the smartphone, tablet, or laptop to scan for available connections.

Select theELM327 scan tool.

Input the pairing code.

The first step is to try alternate pairing codes.

After that, pair the scanner with a different equipment.

Another thing that can cause a failed pairing is the limited amount of time your scanner remains discoverable.

If your scan tool still doesn’t pair, the unit may be faulty.

This is the primary reason that it’s a good idea to stay away from cheap, cloned scanners.

Buy a scanner from a retailer that stands behind its products.

ELM327 Bluetooth Alternatives

The alternatives to ELM327 Bluetooth scanners are devices that useWi-Fiand USB connections.