OBD2: Check Engine Reset

OBD2 Guides

Check Engine Light & OBD2 Guides

Plain-language guides to diagnosing and resetting a Check Engine Light with a compatible OBD2 scanner and your phone — from choosing an adapter to reading the diagnostic code on your own car.

Diagnose & Reset Your Check Engine Light

Start here if the warning light is on right now and you want to understand it and clear it.

How to Reset a Check Engine Light With OBD2

Learn how to reset a Check Engine Light with a compatible OBD2 scanner and your phone. Connect, diagnose the code and clear the warning with OBD2: Check Engine Reset.

How to Read Check Engine Codes With an OBD2 Scanner

Learn how to read Check Engine diagnostic trouble codes using an OBD2 scanner and your iPhone or Android phone.

How to Clear Check Engine Codes With OBD2

Connect an OBD2 scanner to your phone, read Check Engine diagnostic codes and clear the Check Engine Light using a simple OBD2 app.

Check Engine Light Diagnostic App for iPhone & Android

Diagnose your Check Engine Light from your phone. Connect an OBD2 scanner, read the diagnostic code and reset the warning with a simple iPhone or Android app.

OBD2 Scanners & Adapters

How OBD2 scanner apps and ELM327-compatible adapters work together with your phone.

OBD2 Scanner App for Check Engine Diagnostics

Use your phone as an OBD2 scanner. Read Check Engine diagnostic codes and reset the Check Engine Light with a compatible ELM327 adapter on iPhone or Android.

ELM327 Check Engine Light Reset App

Use a compatible ELM327 OBD2 adapter to diagnose and reset your Check Engine Light from an iPhone or Android phone.

Phones & Connection Types

Choosing the right adapter for iPhone or Android, over Bluetooth, BLE or Wi-Fi.

OBD2 Scanner App for iPhone

Use your iPhone to diagnose and reset a Check Engine Light with a compatible BLE or Wi-Fi OBD2 scanner.

OBD2 Scanner App for Android

Connect a Bluetooth, BLE or Wi-Fi OBD2 scanner to Android to diagnose and reset your Check Engine Light with a simple mobile app.

Bluetooth OBD2 Scanner App for Check Engine Lights

Connect a Bluetooth or BLE OBD2 scanner to your phone, diagnose the Check Engine Light and reset it with OBD2: Check Engine Reset.

Wi-Fi OBD2 Scanner App for iPhone & Android

Use a compatible Wi-Fi OBD2 scanner with your iPhone or Android phone to diagnose and reset a Check Engine Light.

Check Engine Guides by Car Brand

Brand-specific context for diagnosing a Check Engine Light on common OBD-II vehicles.