eFlexGauge E85 Ethanol Gauge
eFlexGauge Core is an E85 ethanol gauge that communicates via Bluetooth with the eFlexApp, giving you real‑time visibility into ethanol content, fuel temperature, and additional data directly on your mobile device.
In addition to its wireless functionality, the unit features a configurable frequency output designed for seamless integration with aftermarket ECUs. This allows you to feed accurate ethanol content and temperature data directly into engine management systems for tuning and diagnostics. Additionally, the unit provides a set point switching output for driving indicator lights, relays, and other add on components.
The highly precise ethanol content reading provided by eFlexGauge can also be used when selecting the correct calibration or tune for your ECU (e.g., platforms like HP Tuners).
Compatibility
eFlexGauge Core is compatible with any gasoline or flex‑fuel vehicle, including cars, trucks, motorcycles, boats, and more. If your vehicle does not have ethanol sensor, you have to select "Ethanol Sensor Pack" option.
Notice! This is not an E85 conversion kit!
Available eFlexFuel E85 conversion kits are here.
Y-Splitter available on accessories store.
$199 If your vehicle already have an ethanol sensor, you can select "No Ethanol Sensor Pack".
eFlexApp
Dynamic Gauge Screen
with Key Information
Real-time Log Data
for Sensor Inputs
Real-time Overview
for Simple Measurements
What eFlexGauge Core includes?
+Hardware
- Control Unit
- IP68 Waterproof
- Plug‑and‑play wiring harness
- External temperature sensor (e.g. engine)
- Installation manual
- 5-year warranty (with registration)
- Ethanol sensor (original Continental) - optional
- Fuel line accessories - optional
+Additional Ethanol Sensor Pack
- Ethanol sensor (original GM, Continental)
- Fuel line 1m, 3feet
- Fuel clamps
- Fuel line quick connectors
- Fuel line disconnect tool
- Content varies depending on selection (6-12.5mm set, M14, M16, Springlock)
All of our accessories and ethanol sensor are sold separetly in spare parts store.
+eFlexApp (iOS & Android)
- Ethanol content
- Fuel temperature
- External temperature sensor
- GPS speed
- Control unit / Ethanol sensor error codes
- Log chart view
- Refuel diary
- E85 stations map
- Regional settings
- Themes dark/light
+Input & Output
- Ethanol sensor input
- Ethanol sensor passthrough
- Standalone ECU connectivity
- Configurable frequency output
- Set point switching output (GND)
