diff --git a/firmware/controllers/algo/engine.cpp b/firmware/controllers/algo/engine.cpp
index 0ccde37c9d..c3eeda8b85 100644
--- a/firmware/controllers/algo/engine.cpp
+++ b/firmware/controllers/algo/engine.cpp
@@ -119,6 +119,7 @@ void Engine::reset() {
 	isRunningPwmTest = false;
 	isTestMode = false;
 	isSpinning = false;
+	isCltBroken = false;
 	adcToVoltageInputDividerCoefficient = NAN;
 	sensors.reset();
 	memset(&ignitionPin, 0, sizeof(ignitionPin));
diff --git a/firmware/controllers/algo/engine.h b/firmware/controllers/algo/engine.h
index 654596f378..b161a4bbc5 100644
--- a/firmware/controllers/algo/engine.h
+++ b/firmware/controllers/algo/engine.h
@@ -274,6 +274,8 @@ public:
 	 */
 	bool isAlternatorControlEnabled;
 
+	bool isCltBroken;
+
 
 //	floatms_t callToPitEndTime;
 
diff --git a/firmware/controllers/sensors/thermistors.cpp b/firmware/controllers/sensors/thermistors.cpp
index e6dd610e48..880136e30e 100644
--- a/firmware/controllers/sensors/thermistors.cpp
+++ b/firmware/controllers/sensors/thermistors.cpp
@@ -106,14 +106,17 @@ bool hasCltSensor(DECLARE_ENGINE_PARAMETER_F) {
  */
 float getCoolantTemperature(DECLARE_ENGINE_PARAMETER_F) {
 	if (!hasCltSensor(PASS_ENGINE_PARAMETER_F)) {
+		engine->isCltBroken = false;
 		return NO_CLT_SENSOR_TEMPERATURE;
 	}
  	float temperature = getTemperatureC(&engineConfiguration->clt, &engine->engineState.cltCurve);
 	if (!isValidCoolantTemperature(temperature)) {
 		efiAssert(engineConfiguration!=NULL, "NULL engineConfiguration", NAN);
 		warning(OBD_Engine_Coolant_Temperature_Circuit_Malfunction, "unrealistic CLT %f", temperature);
+		engine->isCltBroken = true;
 		return LIMPING_MODE_CLT_TEMPERATURE;
 	}
+	engine->isCltBroken = false;
 	return temperature;
 }