Monitoring Vehicle Parameters: A Guide to OBD2 Scanners and Apps

Introduction

This document outlines options for monitoring engine and transmission parameters, reading error codes, and accessing injector values on a vehicle equipped with an OBD2 port, specifically focusing on solutions compatible with both iOS and Android devices.

Problem

The goal is to find a suitable tool for monitoring various vehicle parameters, including:

  • Transmission Temperature
  • Engine Temperature
  • Exhaust Gas Temperature (requires installation of an exhaust temp bung)
  • Boost Pressure
  • Error Codes (reading and resetting)
  • Injector Values

Solution

Several options are available, each with its own advantages:

  1. EOBD-Facile (iOS) with a Wi-Fi OBD2 Dongle: A free app that can monitor various parameters like MAF and fuel trims. Requires a Wi-Fi OBD2 adapter purchased separately (e.g., from eBay).
  2. UltraGauge with Bluetooth OBD2 Dongle and iPad Mini: The UltraGauge app is powerful and allows custom gauge displays. It can use ScanGauge codes to extract transmission temperatures.
  3. Torque Pro (Android) with OBD2 Dongle: Requires an Android device or head unit.

Relevant Parts and Tools

  • OBD2 Dongle (Wi-Fi or Bluetooth): Required to interface with the vehicle’s OBD2 port. Choose a model compatible with your chosen app (EOBD-Facile, UltraGauge, Torque Pro).
  • UltraGauge Unit and App
  • EOBD-Facile (iOS app)
  • Torque Pro (Android app)
  • Exhaust Temp Bung: Required for monitoring Exhaust Gas Temperature; needs to be welded into the exhaust system.

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