Best Diagnostic Tool To Check Engine Light Apps

250+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated July 2026

From beginner-friendly picks to power-user tools, our diagnostic tool to check engine light list covers 250+ iPhone apps updated through July 2026. Compare ratings, prices, and screenshots in one place.

Compare top Diagnostic Tool To Check Engine Light Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Car Scanner ELM OBD2Car Scanner ELM OBD2Free4.8★ (32K)YesYesAug 2026
2FIXD OBD2 ScannerFIXD OBD2 ScannerFree4.6★ (26K)NoYesAug 2026
3BlueDriver OBD2 Scan ToolBlueDriver OBD2 Scan ToolFree4.6★ (14K)NoNoAug 2026
4Car Scanner | OBD Auto DoctorCar Scanner | OBD Auto DoctorFree4.4★ (6.1K)NoYesAug 2026
5RepairSolutions2RepairSolutions2Free4.8★ (36K)NoYesAug 2026
6AutophixAutophixFree3.8★ (27)NoYesMay 2026
7EngineScan AIEngineScan AIFree5.0★ (1)NoNoJul 2026
8The AnalogueThe AnalogueFreeNoNoJul 2026

Top Picks for Diagnostic Tool To Check Engine Light

Car Scanner ELM OBD2#1

Car Scanner ELM OBD2 by Stanislav Svistunov

The best OBD2 diagnostic tool!
Editor's Choice
🔧 Utilities
4.8😊(32K ratings)
FreeAdsIn-App Purchases
Car Scanner ELM OBD2 screenshot 1
Car Scanner ELM OBD2 screenshot 2
Car Scanner ELM OBD2 screenshot 3
Car Scanner ELM OBD2 screenshot 4
Car Scanner ELM OBD2 screenshot 5
Car Scanner ELM OBD2 screenshot 6

Monitor your car's performance, diagnose engine issues, and view sensor data in real-time. Customize your dashboard with gauges and charts, and reset fault codes. Supports a wide range of vehicles and offers advanced features for specific car brands.

What We Love

  • 🚀 Works great with cheap OBD2 adapters
  • 👍 Highly customizable dashboard
  • 👍 Comprehensive sensor data
  • 👍 Helpful error code lookup

Room to Improve

  • 🐛 Occasional connection issues
  • 🐛 Incorrect sensor readings for some vehicles
  • 🐛 Crashes or freezes on some devices
FIXD OBD2 Scanner#2

FIXD OBD2 Scanner by FIXD Automotive Inc

Clear Your Check Engine Light
Strong Contender
🔧 Utilities
4.6😐(26K ratings)
FreeIn-App Purchases
#44in Utilities
FIXD OBD2 Scanner screenshot 1
FIXD OBD2 Scanner screenshot 2
FIXD OBD2 Scanner screenshot 3
FIXD OBD2 Scanner screenshot 4
FIXD OBD2 Scanner screenshot 5
FIXD OBD2 Scanner screenshot 6

This app translates your car's diagnostic trouble codes into plain language, helping you understand potential issues and their severity. It provides maintenance reminders and offers advanced features like issue forecasting and emissions pre-checks with a premium subscription.

What We Love

  • 👍 Easy to use
  • 🚀 Quickly identifies problems
  • 💰 Saves money on mechanics
  • 🔍 Provides detailed diagnostic information

Room to Improve

  • 🔒 Requires subscription for full functionality
  • 💰 Expensive premium subscription
  • 🤖 Inconsistent performance across vehicles
BlueDriver OBD2 Scan Tool#3

BlueDriver OBD2 Scan Tool by Lemur Vehicle Monitors

Fear No Fix™
Worth Considering
📊 Productivity
4.6😊(14K ratings)
Free
BlueDriver OBD2 Scan Tool screenshot 1
BlueDriver OBD2 Scan Tool screenshot 2
BlueDriver OBD2 Scan Tool screenshot 3
BlueDriver OBD2 Scan Tool screenshot 4
BlueDriver OBD2 Scan Tool screenshot 5

This app turns your smartphone into a powerful OBD2 scan tool. It allows you to read and clear trouble codes, view live data, and generate detailed repair reports for your vehicle. Understand your car's issues and make informed repair decisions.

What We Love

  • 👍 Easy to use
  • 🚀 Excellent diagnostic capabilities
  • 💰 Great value for money
  • 🔍 Detailed fault code information

Room to Improve

  • 🐛 Occasional Bluetooth connectivity issues
  • ⚠️ Limited support for some vehicle makes/models
  • 🚫 Cannot read odometer information

More Diagnostic Tool To Check Engine Light apps to explore

4
Car Scanner | OBD Auto Doctor
Car Scanner | OBD Auto Doctor
Car Scanner | OBD Auto Doctor
OBD2 diagnostic for ELM 327
Free

Diagnose your car's engine light issues and monitor real-time performance data. This app allows you to read and clear diagnostic trouble codes, track fuel consumption, and view sensor data. It's a comprehensive tool for understanding your vehicle's health.

Read and clear OBD2 diagnostic trouble codes (DTC)Reset Check Engine LightMonitor real-time vehicle data and sensor readings
🔧 Utilities
(6.1K)
free with in-app purchases
5
RepairSolutions2
RepairSolutions2
RepairSolutions2
by Innova Electronic
Free

This app provides comprehensive vehicle care and repair information for car and truck owners, DIYers, and technicians. It offers diagnostic capabilities with compatible OBD2 scanners and a vast database of verified fixes from ASE Master Technicians. Users can also access free vehicle maintenance information and schedule repairs.

OBD2 scanner integrationVerified repair databaseDiagnostic trouble code definitions
🔧 Utilities
(36K)
free with in-app purchases
6
Autophix
Autophix
Autophix
by Autophix Tech Co., Ltd
Free

This application provides comprehensive vehicle diagnostics, allowing users to read and clear error codes, view live data streams, and perform maintenance resets. It supports full OBD2 diagnostic modes and offers a dashboard for monitoring vehicle performance. Diagnostic data can be saved and shared.

Read and erase diagnostic trouble codesView live data streamsPerform maintenance resets
🔧 Utilities
(27)
free with in-app purchases
7
EngineScan AI
EngineScan AI
EngineScan AI
AI-Powered Engine Diagnosis
Free

Analyze your vehicle's engine health by recording its sound. This AI-powered tool provides a basic diagnosis and can unlock deeper repair insights with an optional premium report. It also helps manage vehicle maintenance and find service locations.

AI engine sound analysisBasic diagnosis with rewarded adsUnlockable Premium Report
🔧 Utilities
(1)
free with in-app purchases
8
The Analogue
The Analogue
The Analogue
by Chase Waters
Free
🔧 Utilities
(0)
9
OBDThink
OBDThink
OBDThink
Coding & Scan for Bimmer Cars
Free
📊 Productivity
(0)
10
DrivePulse: Car Mileage Log
DrivePulse: Car Mileage Log
DrivePulse: Car Mileage Log
Diagnostics, fuel use, trips
Free

Transforms your iPhone into a car's onboard computer. It automatically logs trips, monitors vehicle health, and provides detailed diagnostics via an OBD2 adapter. Offers fuel tracking, maintenance reminders, and a live dashboard.

Automatic trip loggingVehicle health monitoringOBD2 diagnostics with code explanations
🗺️ Navigation
(1)
free with in-app purchases
11
OBD2 Car Scanner - EOBD Facile
OBD2 Car Scanner - EOBD Facile
OBD2 Car Scanner - EOBD Facile
Torque & ELM327 OBD Diagnostic
Free

Transform your smartphone into a professional car diagnostic tool. Read and clear engine fault codes, monitor real-time sensor data, and perform advanced diagnostics without a mechanic. Supports a wide range of OBD2 compliant vehicles.

Read and clear engine fault codesMonitor real-time sensor dataTurn off check engine light
🔧 Utilities
(5K)
free with in-app purchases
12
Lippert Diagnostics
Lippert Diagnostics
Lippert Diagnostics
by Lippert Components, INC.
Free
🔧 Utilities
(0)
13
Driveline Wizard
Driveline Wizard
Driveline Wizard
by Tom Wood's Drive Shafts
Free

Access driveline information, tools, and calculators. Measure angles, diagnose vibrations, and identify U-joint sizes. Features include diagnostic tools and measurement capabilities.

Driveline informationMeasurement toolsDiagnostic capabilities
📊 Productivity
(1)
free
14
OBD2 Car Scanner ELM327: Cavox
OBD2 Car Scanner ELM327: Cavox
OBD2 Car Scanner ELM327: Cavox
Check engine light? AI verdict
Free
🔧 Utilities
(1)
15
OBD2UDS - Car Diagnostic Pro
OBD2UDS - Car Diagnostic Pro
OBD2UDS - Car Diagnostic Pro
UDS Engine Scan & Live Data
Free
🔧 Utilities
(0)
16
Car dashboard light AI
Car dashboard light AI
Car dashboard light AI
Diagnose Car Issues & Lights
Free
🔧 Utilities
(0)
17
UJS OBDII
UJS OBDII
UJS OBDII
OBD Tool
Free

This professional car diagnostic app connects to UJS OBDII devices via Bluetooth to read and clear fault codes, monitor real-time vehicle performance, and analyze travel data. It supports multiple languages and offers high-speed, low-power data transmission.

Fault code reading and clearingReal-time instrument panel displayVehicle performance testing
🔧 Utilities
(1)
free
18
MODI Mobile Diagnostics
MODI Mobile Diagnostics
MODI Mobile Diagnostics
MODI Mobile Diagnostics
Free
🔧 Utilities
(0)
19
Torque OBD2 Pro-Car Check Tool
Torque OBD2 Pro-Car Check Tool
Torque OBD2 Pro-Car Check Tool
Live data and maintenance log
Free

Transform your phone into a smart car tool. Connect via Bluetooth to read error codes, monitor live data, and log maintenance. Stay organized and ensure road safety with this vehicle companion.

Bluetooth OBD2 connectionRead diagnostic trouble codesMonitor live vehicle data
📊 Productivity
(3)
subscription
20
Carutoo - AI Car Care & Repair
Carutoo - AI Car Care & Repair
Carutoo - AI Car Care & Repair
by Foavi Inc
Free

Get AI-powered insights into your car's issues by describing symptoms. Understand warning lights, strange noises, and performance problems with clear explanations and repair cost estimates. No mechanical expertise or OBD2 scanner needed.

AI-powered symptom analysisClear explanation of car problemsWarning light interpretation
🔧 Utilities
(2)
freemium

FAQ about Diagnostic Tool To Check Engine Light

What are the best diagnostic tool to check engine light apps for iPhone?
Car Scanner ELM OBD2 tops our diagnostic tool to check engine light apps ranking as of July 2026, with a 4.8-star average from 32K App Store ratings, and it's free to download.
Yes — 20 of the top diagnostic tool to check engine light apps we rank are free to download, including Car Scanner ELM OBD2 and FIXD OBD2 Scanner.
Car Scanner ELM OBD2 shows ads and offers in-app purchases, according to its App Store listing as of July 2026.
We track 250+ diagnostic tool to check engine light apps on the iOS App Store as of July 2026, ranked by rating, recency, and analysis of real user reviews.
This app acts as a vehicle diagnostic tool, performance monitor, and trip computer. It connects to your car's OBD2 engine management system via a Wi-Fi or Bluetooth adapter to display real-time sensor data, read and reset fault codes, and provide detailed vehicle information.
Key features include real-time sensor data display, the ability to read and reset DTC fault codes with a large database of descriptions, customizable dashboards with gauges and charts, extended PID support for hidden information, Mode 06 test results, emission test readiness checks, and accurate acceleration measurements.