2022 svartpillen 401 ecu failure message,no gear indicator

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hello everyone, i recently bought a svartpillen 401 and it started intermittently having an error message pop up that said ecu failure and the gear position would stop displaying. the obd2 tool says the error code is "P0916 #07E8 Gear shift position circuit A low". I have replaced the gear position sensor with new factory oem, i have replace the battery with new, i have done voltage readings at the stator and at the battery and everything seems to be good. i did continuity checks at the sensor to ensure proper function. i have stripped the wire covering on the harness to check for breaks in the wires and cleaned all grounding and battery terminals to ensure there is no corrosion. at this point i am not sure what else to check or if the ecu is bad . any recomendations would be greatly appreciated , i am about at my wits end with this bike.

 

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for anyone having the same issue i recieved this help on a face book post seems the ecu is bad just posting as a FYI
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It sounds like you’ve already done some heavy lifting with the wiring harness and stator—honestly, checking the harness for breaks is a "fun" weekend nobody asks for.
The code P0916 specifically refers to the Gear Shift Position Sensor Circuit Low. Since you've already replaced the sensor and checked the wiring, you are down to a few final possibilities before you drop the money on a new ECU.
1. The "Ghost" Voltage Test
Since the error is now immediate, you can perform a Back-Probe Test at the ECU connector itself. This confirms if the signal is actually reaching the "brain."
The Goal: Ensure the ECU is receiving the correct reference voltage and sending back the right signal.
The Process: Use a multimeter to check the voltage at the ECU pins corresponding to the gear position sensor.
If the voltage at the sensor is fine, but the voltage at the ECU pin is low or zero, you still have a hidden wiring/connector issue.
If the voltage at the ECU pin is correct (usually a 5V reference) but the ECU still displays the error, the internal processing circuit of the ECU is likely fried.
2. Check the "Ground" (The Silent Killer)
ECUs are incredibly sensitive to ground loops or poor grounding.
The Test: Check the resistance between the ECU’s ground pin and the negative battery terminal. It should be nearly zero (under 0.2 ohms).
Why? A "floating ground" can cause the ECU to misinterpret a perfectly good sensor signal as a "Circuit Low" (P0916) error because the reference point has shifted.
3. The "Pin Fit" Physical Check
Since you’ve had the harness open, check the actual pins inside the ECU connector.
Look for "terminal tension." If a female pin has spread open, it won't make a solid connection with the ECU male pin.
Check for tiny amounts of green corrosion (verdigris) inside the plug. Even a microscopic amount can increase resistance enough to trigger a "Circuit Low" code."