Diagnosing ECA Issues & Ethanol Content Errors

Even with a proper flex fuel setup, issues can arise from ethanol sensor failures or incorrect CAN communication.

Common Symptoms of ECA Issues

Issue	Possible Cause	Solution

Issue	Possible Cause	Solution
Ethanol content stuck at 0%	No CAN signal from ECA	Verify wiring & check CAN bus ID
Ethanol fluctuates randomly	Sensor malfunction or poor grounding	Check sensor voltage stability or replace ECA
Ethanol jumps between values	CAN ID conflict with another module	Ensure correct CAN ID settings in MG Flasher

Enable Static Mode to set a fixed ethanol value, this can be done On-The-Fly with Cruise Controls or in-app: Ethanol Content Override
Use fuel trims and knock sensor feedback to fine-tune timing if ethanol content is unknown.