MES will reject cheap v1.4 clones during “Test” – error ELM327 v1.4 not supported for 2021 models .
If you’re using Multiecuscan with an ELM327 adapter (2021 setup), use these settings for reliable connection and diagnostics: multiecuscan elm327 port settings 2021
Keep these at their default values (typically 4096) unless otherwise specified by your interface manufacturer. Multiecuscan Connection Comparison MES will reject cheap v1