---
product_id: 16457136
title: "D2 Digital Wideband O2 Air Fuel Ratio Controller All-in-One 2 1/16\" (52mm) Gauge - White Faceplate (Red)"
brand: "apsx"
price: "€ 11.74"
currency: EUR
in_stock: false
url: https://www.desertcart.es/products/16457136-d2-digital-wideband-o2-air-fuel-ratio-controller-all-in
store_origin: ES
region: Spain
---

# On-board controller reduces wiring complexity 5 vibrant LED color options for instant fuel type & AFR status Multiple outputs: analog, digital, simulated narrowband D2 Digital Wideband O2 Air Fuel Ratio Controller All-in-One 2 1/16" (52mm) Gauge - White Faceplate (Red)

**Brand:** apsx
**Price:** € 11.74
**Availability:** ❌ Out of Stock

## Summary

> 🚗 Tune like a pro, see every drop—your engine’s new best friend!

## Quick Answers

- **What is this?** D2 Digital Wideband O2 Air Fuel Ratio Controller All-in-One 2 1/16" (52mm) Gauge - White Faceplate (Red) by apsx
- **How much does it cost?** € 11.74 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/16457136-d2-digital-wideband-o2-air-fuel-ratio-controller-all-in)

## Best For

- apsx enthusiasts

## Why This Product

- Trusted apsx brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Vivid LED Feedback:** Stay ahead with a sweeping LED needle that visually signals rich to lean air-fuel ratios in real-time.
- • **On-Gauge Programming:** Adjust limits and calibrations directly on the gauge—no PC or tablet needed, perfect for on-the-go tuning.
- • **Fail-Safe Connectivity:** Locking connectors ensure foolproof installation—no wrong connections, no downtime.
- • **Plug-and-Play Simplicity:** Get your engine monitoring up and running in minutes with minimal wiring hassle.
- • **Versatile Fuel Compatibility:** Supports E85, Diesel, Gasoline, and Methanol with customizable settings tailored to your ride.

## Overview

The APSX D2 Digital Wideband O2 Air Fuel Ratio Controller combines a sleek 2 1/16" gauge with advanced on-board control, offering analog and digital outputs compatible with EMS and data loggers. Featuring a bright, anti-glare faceplate and customizable LED colors, it supports multiple fuel types and provides real-time air-fuel ratio feedback with fail-safe connectors and easy on-gauge programming for seamless installation and precise tuning.

## Description

Faceplates can be BLACK or WHITE Item Specifications: D2 wideband controller gauge features: 1 - Less wiring - controller on-board 2 - Simple installation - plug-and-play 3 - One of the five bright LED color options (Red / Green / Orange / Blue / White) per gauge for four configurable types of fuel (E85, Diesel, Gasoline and Methanol) and lambda display 4 - Sweeping LED "needle" indicator from rich (green) then normal (orange) to lean (red) 5 - Fail safe LOCKED connector - it is not possible to make a wrong connection 6 - Anti-glare faceplate - Non-destructable polycarbonate. Additional faces are paid extra 7 - Multiple outputs for digital (to PC), analog (to data logger / EMS), narrowband for simulation and extra switch options 8 - On-Gauge Programming Button - No need a PC or tablet for programming upper/lower limits and other settings OUTPUTS 1 - Analog 0-5V (9=19 AFR) linear output for engine management systems (EMS) and data loggers (MegaSquirt) 2 - Digital output is 9600 8N1 serial that can be connected to your PC 3 - Simulated NB output WIRING - APSX D2 has a 4ft output cable (5 cables / green-white-red-brown-black) - Red power cable goes to 12V source in your vehicle - Black cable goes to a grounded source such as battery ground (-) post - Green digital output is 9600 8N1 serial that can be connected to your PC - If you want to connect other devices such as data loggers or AFR gauges, you can use white analog cable for 0-5V output - Brown narrowband cable is for simulated NB In The Box: D2 gauge assembly, pre-assembled output and oxygen sensor cables with connectors and Bosch LSU4.2 (part# 17014). D2 assembly includes anti-glare faceplate, black bezel, bung and LED display.

## Features

- Analog output for engine management systems (EMS) and data loggers (MegaSquirt)
- Digital output is 9600 8N1 serial that can be connected to your PC
- Simulated NB output
- Configurable settings such as fuel type, lower/upper limits, calibration

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | APSX |
| Brand | APSX |
| Item Weight | 1 pounds |
| Product Dimensions | 2 x 1 x 2 inches |
| Item model number | APSX_D2_WRG |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | APSX_D2_WRG |

## Images

![D2 Digital Wideband O2 Air Fuel Ratio Controller All-in-One 2 1/16" (52mm) Gauge - White Faceplate (Red) - Image 1](https://m.media-amazon.com/images/I/61SqaRKw-xL.jpg)
![D2 Digital Wideband O2 Air Fuel Ratio Controller All-in-One 2 1/16" (52mm) Gauge - White Faceplate (Red) - Image 2](https://m.media-amazon.com/images/I/61-ihMIqEfL.jpg)
![D2 Digital Wideband O2 Air Fuel Ratio Controller All-in-One 2 1/16" (52mm) Gauge - White Faceplate (Red) - Image 3](https://m.media-amazon.com/images/I/61Bw8buz-RL.jpg)
![D2 Digital Wideband O2 Air Fuel Ratio Controller All-in-One 2 1/16" (52mm) Gauge - White Faceplate (Red) - Image 4](https://m.media-amazon.com/images/I/61GkK1aCnfL.jpg)
![D2 Digital Wideband O2 Air Fuel Ratio Controller All-in-One 2 1/16" (52mm) Gauge - White Faceplate (Red) - Image 5](https://m.media-amazon.com/images/I/71k+jOdjcZL.jpg)

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-24*