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So I have an 05 RSX with the rev2 in ecu also have the Bluetooth module installed. My issue is that occasionally at random times the car will act as if a main relay is powering off for a split second then right back to normal. I happened to notice today that the gauges drop off and the check engine lights flashed on when this happens. I have replaced every relay inside the car with no avail. I don’t remember this happening before the Bluetooth module was installed but I am not 100% on that as it’s been a while. Anybody else had or seen this before?

The BT module should not interfere with the ECU. It only communicates with the unit itself. We have had someone else report an off/on "click" seemingly random, but we were never able to track down a cause.

Ok well, thanks for the response. If I happen to narrow this down I will update

That sounds good. Contact directly by email if you want to outline testing and results.

I have same problem in accord cl9