EVO-AUDT2 in 2022 Q7 wont program key or recognize key fobs when T-Harness installed

Wed, 21 Jan 2026 21:11:12 +0000

Issue:
Vehicle does not detect key fobs when THAR-AUD2 T-harness is installed

Hardware:

EVO-ALL
THAR-AUD2 T-harness (from EVO-AUDT2 kit)

Symptoms:
When the THAR-AUD2 T-harness is installed, the vehicle displays the message:

“Remote Control Key. Hold back of key against designated area.”

The vehicle will not start.

Troubleshooting Performed:

Placed working fob (with battery) in the cup holder (designated area) → vehicle still does not start
Second fob is attached to the harness antenna with the battery removed
Attempted EVO-ALL programming procedure (waited for LED to turn blue) → no change
Tried starting with working fob in hand and in cup holder → same message
Disconnected EVO-ALL module from the T-harness → issue still occurs
Removed the T-harness completely → vehicle immediately detects both fobs and starts normally
Reinstalled T-harness → issue returns

Key Observation:
The issue occurs solely from installing the THAR-AUD2 T-harness, even with the EVO-ALL module disconnected. Removing the harness restores normal key detection and vehicle operation.

Request:
Please advise if this is a known issue with the THAR-AUD2, a compatibility concern, or if additional configuration or wiring checks are recommended.

Questions & Answers - Questions récentes tagguées thar-aud2

EVO-AUDT2 in 2022 Q7 wont program key or recognize key fobs when T-Harness installed