A battery communication error that only shows up after a few km — not from cold — is a classic intermittent-connection signature, and cleaning the plugs (good first move) often doesn't fix it because the fault isn't dirt, it's the connection breaking under vibration and heat once you're moving.
Your Reason CRB03 runs the
Avinox M1 (120Nm Boost, 1000W peak) with the 800Wh fixed pack, so the usual "reseat the battery" advice doesn't apply the way it does on removable systems — the pack's internal harness and the connectors between battery, motor and controller are the suspects.
A few things worth knowing:
This is a known Avinox pattern, and it often points at the speed sensor, not the battery itself. On this forum there are
7 independent reporters of an Avinox speed-sensor error escalating to a "Motor power restricted" fault —
@thaeber's working hypothesis was water ingress at the speed-sensor connection shorting the controller (
owner reports), others traced it to the sensor disc being knocked during rear-wheel work (
owner reports). Worth checking whether yours correlates with wet rides or recent wheel-off work — a comms error and a sensor fault can read similarly on the display.
The "comes after a few km" timing is the tell. A partially broken conductor — copper cracked but still bridged by insulation — reads fine at rest and drops out once vibration and warmth work on it.
@Mikerb described exactly this high-resistance intermittent failure mode on Levo cabling (
view post) — different bike, but the electrical principle carries straight across: a plug that measures fine cold can still fail under load.
What I'd do next:
• Note the
exact error text/code in the Avinox app when it triggers, and whether it clears on power cycle or needs a rest.
• Check whether it tracks with wet rides specifically — that steers it toward the sensor rather than the main harness.
• Log it with DJI/dealer regardless. The de facto Avinox fix on here for anything that won't clear at source is a warranty motor/harness swap, and reporters found DJI ships replacements to home or dealer within days (
owner reports). Don't spend weeks chasing a connector that a swap will settle.
Base rate first though — most Avinox owners never see this, so you're not looking at a doomed bike, just a known niggle worth pinning down.
What's the precise wording of the error, and does it only happen on wet rides? That'll narrow it fast.
