diff --git a/firmware/controllers/algo/auto_generated_enums.cpp b/firmware/controllers/algo/auto_generated_enums.cpp
index e0281d62ae..7e5a705e82 100644
--- a/firmware/controllers/algo/auto_generated_enums.cpp
+++ b/firmware/controllers/algo/auto_generated_enums.cpp
@@ -70,6 +70,8 @@ case EFI_ADC_8:
   return "EFI_ADC_8";
 case EFI_ADC_9:
   return "EFI_ADC_9";
+case EFI_ADC_TEMP_SENSOR:
+  return "EFI_ADC_TEMP_SENSOR";
 case EFI_ADC_ERROR:
   return "EFI_ADC_ERROR";
 case EFI_ADC_NONE:
diff --git a/firmware/controllers/algo/rusefi_hw_enums.h b/firmware/controllers/algo/rusefi_hw_enums.h
index d184e8f747..29f14d584c 100644
--- a/firmware/controllers/algo/rusefi_hw_enums.h
+++ b/firmware/controllers/algo/rusefi_hw_enums.h
@@ -265,6 +265,7 @@ typedef enum __attribute__ ((__packed__)) {
 	EFI_ADC_14 = 15, // PC4
 	EFI_ADC_15 = 16, // PC5
 
-	// todo: bad choice of value since now we have ADC_CHANNEL_SENSOR and could end up with 17 and 18 also
-	EFI_ADC_ERROR = 17,
+	EFI_ADC_TEMP_SENSOR = 17, // Internal temp sensor
+
+	EFI_ADC_ERROR = 50,
 } adc_channel_e;
diff --git a/firmware/hw_layer/adc/adc_inputs.cpp b/firmware/hw_layer/adc/adc_inputs.cpp
index 573073b3b5..53cc778427 100644
--- a/firmware/hw_layer/adc/adc_inputs.cpp
+++ b/firmware/hw_layer/adc/adc_inputs.cpp
@@ -248,13 +248,18 @@ static void fast_adc_callback(GPTDriver*) {
 }
 #endif /* HAL_USE_GPT */
 
-float getMCUInternalTemperature(void) {
+float getMCUInternalTemperature() {
 #if defined(ADC_CHANNEL_SENSOR)
-	float TemperatureValue = adcToVolts(slowAdc.getAdcValueByHwChannel(ADC_CHANNEL_SENSOR));
-	TemperatureValue -= 0.760; // Subtract the reference voltage at 25 deg C
-	TemperatureValue /= .0025; // Divide by slope 2.5mV
+	float TemperatureValue = adcToVolts(slowAdc.getAdcValueByHwChannel(EFI_ADC_TEMP_SENSOR));
+	TemperatureValue -= 0.760f; // Subtract the reference voltage at 25 deg C
+	TemperatureValue /= 0.0025f; // Divide by slope 2.5mV
 
 	TemperatureValue += 25.0; // Add the 25 deg C
+
+	if (TemperatureValue > 150.0f || TemperatureValue < -50.0f) {
+		firmwareError(OBD_PCM_Processor_Fault, "Invalid CPU temperature measured!");
+	}
+
 	return TemperatureValue;
 #else
 	return 0;
@@ -620,7 +625,7 @@ void initAdcInputs() {
 
 #if defined(ADC_CHANNEL_SENSOR)
 	// Internal temperature sensor, Available on ADC1 only
-	slowAdc.enableChannel((adc_channel_e)ADC_CHANNEL_SENSOR);
+	slowAdc.enableChannel(EFI_ADC_TEMP_SENSOR);
 #endif /* ADC_CHANNEL_SENSOR */
 
 	slowAdc.init();