diff --git a/code/espurna/sensors/BMX280Sensor.h b/code/espurna/sensors/BMX280Sensor.h
index d34bcb8e..4af88815 100644
--- a/code/espurna/sensors/BMX280Sensor.h
+++ b/code/espurna/sensors/BMX280Sensor.h
@@ -89,6 +89,7 @@ class BMX280Sensor : public I2CSensor {
                 _error = SENSOR_ERROR_UNKNOWN_ID;
                 return;
             }
+            _error = SENSOR_ERROR_OK;
 
             #if BMX280_MODE == 1
                 forceRead();
diff --git a/code/espurna/sensors/DHTSensor.h b/code/espurna/sensors/DHTSensor.h
index b7f0809c..77bd5fc5 100644
--- a/code/espurna/sensors/DHTSensor.h
+++ b/code/espurna/sensors/DHTSensor.h
@@ -80,6 +80,7 @@ class DHTSensor : public BaseSensor {
 
         // Pre-read hook (usually to populate registers with up-to-date data)
         void pre() {
+            _error = SENSOR_ERROR_OK;
             _read();
         }
 
diff --git a/code/espurna/sensors/DallasSensor.h b/code/espurna/sensors/DallasSensor.h
index 2fa6ec3c..def41ec4 100644
--- a/code/espurna/sensors/DallasSensor.h
+++ b/code/espurna/sensors/DallasSensor.h
@@ -209,6 +209,11 @@ class DallasSensor : public BaseSensor {
             return MAGNITUDE_NONE;
         }
 
+        // Pre-read hook (usually to populate registers with up-to-date data)
+        void pre() {
+            _error = SENSOR_ERROR_OK;
+        }
+
         // Current value for slot # index
         double value(unsigned char index) {
 
diff --git a/code/espurna/sensors/EmonADC121Sensor.h b/code/espurna/sensors/EmonADC121Sensor.h
index d96d4aec..70732222 100644
--- a/code/espurna/sensors/EmonADC121Sensor.h
+++ b/code/espurna/sensors/EmonADC121Sensor.h
@@ -112,6 +112,8 @@ class EmonADC121Sensor : public EmonSensor {
                 last = millis();
             #endif
 
+            _error = SENSOR_ERROR_OK;
+
         }
 
         // Type for slot # index
diff --git a/code/espurna/sensors/EmonADS1X15Sensor.h b/code/espurna/sensors/EmonADS1X15Sensor.h
index 1a2bef55..da5aab14 100644
--- a/code/espurna/sensors/EmonADS1X15Sensor.h
+++ b/code/espurna/sensors/EmonADS1X15Sensor.h
@@ -241,6 +241,7 @@ class EmonADS1X15Sensor : public EmonSensor {
                 #endif
             }
             last = millis();
+            _error = SENSOR_ERROR_OK;
         }
 
         // Current value for slot # index
diff --git a/code/espurna/sensors/EmonAnalogSensor.h b/code/espurna/sensors/EmonAnalogSensor.h
index 6461cef2..cf96e693 100644
--- a/code/espurna/sensors/EmonAnalogSensor.h
+++ b/code/espurna/sensors/EmonAnalogSensor.h
@@ -94,6 +94,8 @@ class EmonAnalogSensor : public EmonSensor {
                 last = millis();
             #endif
 
+            _error = SENSOR_ERROR_OK;
+
         }
 
         // Current value for slot # index
diff --git a/code/espurna/sensors/MHZ19Sensor.h b/code/espurna/sensors/MHZ19Sensor.h
index 201625cb..7e8fa9bc 100644
--- a/code/espurna/sensors/MHZ19Sensor.h
+++ b/code/espurna/sensors/MHZ19Sensor.h
@@ -197,6 +197,8 @@ class MHZ19Sensor : public BaseSensor {
                     _error = SENSOR_ERROR_OUT_OF_RANGE;
                 }
 
+            } else {
+                _error = SENSOR_ERROR_CRC;
             }
 
         }
diff --git a/code/espurna/sensors/SHT3XI2CSensor.h b/code/espurna/sensors/SHT3XI2CSensor.h
index 74b29d61..783aba56 100644
--- a/code/espurna/sensors/SHT3XI2CSensor.h
+++ b/code/espurna/sensors/SHT3XI2CSensor.h
@@ -66,6 +66,8 @@ class SHT3XI2CSensor : public I2CSensor {
         // Pre-read hook (usually to populate registers with up-to-date data)
         void pre() {
 
+            _error = SENSOR_ERROR_OK;
+            
             unsigned char buffer[6];
 
             #if I2C_USE_BRZO
diff --git a/code/espurna/sensors/SI7021Sensor.h b/code/espurna/sensors/SI7021Sensor.h
index 4ba09987..c0cdba01 100644
--- a/code/espurna/sensors/SI7021Sensor.h
+++ b/code/espurna/sensors/SI7021Sensor.h
@@ -93,9 +93,9 @@ class SI7021Sensor : public I2CSensor {
 
             _error = SENSOR_ERROR_UNKNOWN_ID;
             if (_chip == 0) return;
+            _error = SENSOR_ERROR_OK;
 
             double value;
-            _error = SENSOR_ERROR_OK;
 
             value = _read(SI7021_CMD_TMP_NOHOLD);
             if (_error != SENSOR_ERROR_OK) return;