diff --git a/firmware/controllers/actuators/ac_control.cpp b/firmware/controllers/actuators/ac_control.cpp
index b1751f7932..8139801b1d 100644
--- a/firmware/controllers/actuators/ac_control.cpp
+++ b/firmware/controllers/actuators/ac_control.cpp
@@ -9,6 +9,7 @@ static Deadband<5> maxCltDeadband;
 static Deadband<5> maxTpsDeadband;
 
 bool AcState::getAcState(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
+	latest_usage_ac_control = getTimeNowSeconds();
 	auto rpm = Sensor::getOrZero(SensorType::Rpm);
 
 	engineTooSlow = rpm < 500;
diff --git a/firmware/controllers/generated/ac_control_generated.h b/firmware/controllers/generated/ac_control_generated.h
index 54252ecb9f..9722c3f93f 100644
--- a/firmware/controllers/generated/ac_control_generated.h
+++ b/firmware/controllers/generated/ac_control_generated.h
@@ -1,4 +1,4 @@
-// this section was generated automatically by rusEFI tool ConfigDefinition.jar based on (unknown script) integration/ac_control.txt Thu Oct 14 00:25:42 EDT 2021
+// this section was generated automatically by rusEFI tool ConfigDefinition.jar based on (unknown script) integration/ac_control.txt Thu Oct 14 14:49:24 EDT 2021
 // by class com.rusefi.output.CHeaderConsumer
 // begin
 #pragma once
@@ -101,8 +101,12 @@ struct ac_control_s {
 	/**
 	offset 0 bit 31 */
 	bool unusedBit_6_31 : 1;
-	/** total size 4*/
+	/**
+	 * offset 4
+	 */
+	int latest_usage_ac_control = (int)0;
+	/** total size 8*/
 };
 
 // end
-// this section was generated automatically by rusEFI tool ConfigDefinition.jar based on (unknown script) integration/ac_control.txt Thu Oct 14 00:25:42 EDT 2021
+// this section was generated automatically by rusEFI tool ConfigDefinition.jar based on (unknown script) integration/ac_control.txt Thu Oct 14 14:49:24 EDT 2021
diff --git a/firmware/integration/ac_control.txt b/firmware/integration/ac_control.txt
index 4b5de671c7..b0e4ea3026 100644
--- a/firmware/integration/ac_control.txt
+++ b/firmware/integration/ac_control.txt
@@ -8,4 +8,6 @@ bit tpsTooHigh
 
 bit acButtonState
 
+int latest_usage_ac_control;
+
 end_struct
diff --git a/firmware/tunerstudio/generated/cache.zip b/firmware/tunerstudio/generated/cache.zip
index 4e27fbd057..cfc3ce5b95 100644
Binary files a/firmware/tunerstudio/generated/cache.zip and b/firmware/tunerstudio/generated/cache.zip differ
diff --git a/java_console/models/src/main/java/com/rusefi/config/generated/AcControl.java b/java_console/models/src/main/java/com/rusefi/config/generated/AcControl.java
index 9a521b4ef9..e391b288e7 100644
--- a/java_console/models/src/main/java/com/rusefi/config/generated/AcControl.java
+++ b/java_console/models/src/main/java/com/rusefi/config/generated/AcControl.java
@@ -1,6 +1,6 @@
 package com.rusefi.config.generated;
 
-// this file was generated automatically by rusEFI tool ConfigDefinition.jar based on (unknown script) integration/ac_control.txt Thu Oct 14 00:25:42 EDT 2021
+// this file was generated automatically by rusEFI tool ConfigDefinition.jar based on (unknown script) integration/ac_control.txt Thu Oct 14 14:49:24 EDT 2021
 
 // by class com.rusefi.output.FileJavaFieldsConsumer
 import com.rusefi.config.*;
@@ -38,6 +38,7 @@ public class AcControl {
 	public static final Field UNUSEDBIT_6_29 = Field.create("UNUSEDBIT_6_29", 0, FieldType.BIT, 29);
 	public static final Field UNUSEDBIT_6_30 = Field.create("UNUSEDBIT_6_30", 0, FieldType.BIT, 30);
 	public static final Field UNUSEDBIT_6_31 = Field.create("UNUSEDBIT_6_31", 0, FieldType.BIT, 31);
+	public static final Field LATEST_USAGE_AC_CONTROL = Field.create("LATEST_USAGE_AC_CONTROL", 4, FieldType.INT);
 	public static final Field[] VALUES = {
 	ENGINETOOSLOW,
 	ENGINETOOFAST,
@@ -71,5 +72,6 @@ public class AcControl {
 	UNUSEDBIT_6_29,
 	UNUSEDBIT_6_30,
 	UNUSEDBIT_6_31,
+	LATEST_USAGE_AC_CONTROL,
 	};
 }