diff --git a/firmware/controllers/algo/engine_parts.h b/firmware/controllers/algo/engine_parts.h
index 5c6d20a154..581b08a839 100644
--- a/firmware/controllers/algo/engine_parts.h
+++ b/firmware/controllers/algo/engine_parts.h
@@ -36,6 +36,8 @@ public:
 
 	Accelerometer accelerometer;
 
+	// todo: remove this variable, replace with Sensor::get(SensorType::vbatt).value_or(VBAT_FALLBACK_VALUE)
+	// todo: https://github.com/rusefi/rusefi/issues/2260
 	float vBatt = 0;
 	/**
 	 * that's fuel in tank - just a gauge
diff --git a/firmware/controllers/system_fsio.txt b/firmware/controllers/system_fsio.txt
index 706876d0ca..5e961caa11 100644
--- a/firmware/controllers/system_fsio.txt
+++ b/firmware/controllers/system_fsio.txt
@@ -28,6 +28,7 @@ COMBINED_WARNING_LIGHT=(rpm > fsio_setting(2)) | ((coolant > fsio_setting(3)) |
 # todo: make '5' a setting?
 # todo: always have 'EFI_MAIN_RELAY_CONTROL'?
 # at the moment microRusEFI would not be happy with vbatt > 5 since microRusEFI senses main relay output
+# todo https://github.com/rusefi/rusefi/issues/2258
 #MAIN_RELAY_LOGIC=(time_since_boot >= 0 & time_since_boot < 2) | (vbatt > 5) | in_shutdown
 MAIN_RELAY_LOGIC=(!in_mr_bench) & ((vbatt > 5) | in_shutdown)