diff --git a/firmware/console/binary/tunerstudio.cpp b/firmware/console/binary/tunerstudio.cpp
index b05a22c134..3cb3af385f 100644
--- a/firmware/console/binary/tunerstudio.cpp
+++ b/firmware/console/binary/tunerstudio.cpp
@@ -898,10 +898,12 @@ int tunerStudioHandleCrcCommand(ts_channel_s *tsChannel, char *data, int incomin
 		break;
 #endif /* ENABLE_PERF_TRACE */
 	case TS_GET_CONFIG_ERROR: {
-#if HW_CHECK_MODE
-  #define configError "FACTORY_MODE_PLEASE_CONTACT_SUPPORT"
-#else
 		char * configError = getFirmwareError();
+#if HW_CHECK_MODE
+		// analog input errors are returned as firmware error in QC mode
+		if (!hasFirmwareError()) {
+			strcpy(configError, "FACTORY_MODE_PLEASE_CONTACT_SUPPORT");
+		}
 #endif // HW_CHECK_MODE
 		sr5SendResponse(tsChannel, TS_CRC, reinterpret_cast<const uint8_t*>(configError), strlen(configError));
 		break;
diff --git a/firmware/controllers/algo/engine.cpp b/firmware/controllers/algo/engine.cpp
index ffdea7208c..7f20c1656f 100644
--- a/firmware/controllers/algo/engine.cpp
+++ b/firmware/controllers/algo/engine.cpp
@@ -130,6 +130,14 @@ static void cylinderCleanupControl(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 #endif
 }
 
+#if HW_CHECK_MODE
+static void assertCloseTo(const char * msg, float actual, float expected) {
+	if (actual < 0.9 * expected || actual > 1.1 * expected) {
+		firmwareError(OBD_PCM_Processor_Fault, "%s analog input validation failed %f vs %f", msg, actual, expected);
+	}
+}
+#endif // HW_CHECK_MODE
+
 void Engine::periodicSlowCallback(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 	ScopePerf perf(PE::EnginePeriodicSlowCallback);
 	
@@ -163,7 +171,14 @@ void Engine::periodicSlowCallback(DECLARE_ENGINE_PARAMETER_SIGNATURE) {
 	}
 #endif
 
-	slowCallBackWasInvoked = TRUE;
+	slowCallBackWasInvoked = true;
+
+#if HW_CHECK_MODE
+	assertCloseTo("clt", Sensor::get(SensorType::Clt).Value, 49.3);
+	assertCloseTo("iat", Sensor::get(SensorType::Iat).Value, 73.2);
+	assertCloseTo("aut1", Sensor::get(SensorType::AuxTemp1).Value, 13.8);
+	assertCloseTo("aut2", Sensor::get(SensorType::AuxTemp2).Value, 6.2);
+#endif // HW_CHECK_MODE
 }