diff --git a/selfdrive/car/car_helpers.py b/selfdrive/car/car_helpers.py
index 167366cf6a..47290c89ee 100644
--- a/selfdrive/car/car_helpers.py
+++ b/selfdrive/car/car_helpers.py
@@ -141,6 +141,7 @@ def fingerprint(logcan, sendcan, num_pandas):
       cached = True
     else:
       cloudlog.warning("Getting VIN & FW versions")
+      # enable OBD multiplexing for Vin query, also allows time for sendcan subscriber to connect
       set_obd_multiplexing(params, True)
       # Vin query only reliably works through OBDII
       vin_rx_addr, vin_rx_bus, vin = get_vin(logcan, sendcan, (0, 1))