On take-off I am getting a preflight motor failure warning. When I disconnect my ESC telemetry data I do not get this. My ESC telemetry data using Dshot1200 (mamba f55_128k bl32) does not include motor current and I assume this has something to do with the problem. Is it possible to disable motor fa…

Thank you for you excellent help. I was looking at the log which was recorded when using DShot1200 which did’nt log motor currents. I have set FD_ACT_MOT_C2T = 0 and using DShot600 and the warning has stopped. Many thanks again !

DShot1200 is unreliable and has since been removed. I recommend reducing to DShot600

Thanks for the advice. This makes sense. I have just checked another setup I have using a Pacer P50A ESC which also does not have motor current in its telemetry and this does not give me the failure warning. Tomorrow I will try DShot600.

I have now tried DShot600 and there is no differrence. I still get the motor failure warning on take off. The live ESC telemetry data for motor current in QGC shows spurious values while the log shows no values at all.

Which serial port are you using for ESC telem? Can you share a log?

I am using GPS2. Here is the log using DShot600. Flight Review

This log does not contain the issue. Can you please share a log that captures the issue?

The Failsafe Flags show the fd Motor Failure warning - thats all. The spurious motor amp values I am seeing in QGC do not appear to be logged anywhere however, the QGC motor rpm appear correct.

It looks like the issue is that only 1 ESC is reporting valid current values. The other ESCs are reporting near 0, which triggers this failsafe: src/modules/commander/failure_detector/FailureDetector.cpp 0cddd3dfb // Check if ESC current is too low …

I would try adjusting the parameter FD_ACT_MOT_C2T

Missing ESC Telemetry Amp Data Causing Motor Failure Warning

PX4 Autopilot

aluna July 31, 2025, 7:02pm 6

I am using GPS2. Here is the log using DShot600.

Topic		Replies	Views
ESC Telemetry (Voltage/Current) Missing in QGC After PX4 1.16.x Upgrade QGroundControl	6	125	May 8, 2026
PX4 v1.14.3 - BLHeli_32 Strange Motor output and overheating PX4 Autopilot	3	144	September 13, 2024
Drone Doesnt Take Off, Small bounce PX4 Autopilot	14	273	July 22, 2025
Every few seconds, the motors jiggle Flight Testing & Log Analysis	5	71	May 4, 2026
Tekko32 AM32 ESCs \| Throttle Issues Using QGroundControl	5	876	November 28, 2024

Missing ESC Telemetry Amp Data Causing Motor Failure Warning

Related topics