diff --git a/reference/speeduino.ini b/reference/speeduino.ini
index 720fed51..37cafc54 100644
--- a/reference/speeduino.ini
+++ b/reference/speeduino.ini
@@ -4433,6 +4433,7 @@ cmdVSSratio6 =      "E\x99\x06"
    indicator = { resetLockOn        }, "Reset Lock OFF","Reset Lock ON",     red, black, green,    black
    indicator = { bootloaderCaps > 0 }, "Std. Boot",     "Custom Boot",  white, black, white,    black
    indicator = { nitrousOn          }, "Nitrous Off",   "Nitrous On",   white, black, red,      black
+   indicator = { IOError            }, "I/O Ok",        "I/O Error!",   white, black, red,      black
    ;Engine Protection status indicators
    indicator = { engineProtectStatus}, "Engine Protect OFF",   "Engine Protect ON",   white, black, red,      black
    indicator = { engineProtectRPM   }, "Rev Limiter Off",      "Rev Limiter ON",      white, black, red,      black
@@ -4557,7 +4558,8 @@ cmdVSSratio6 =      "E\x99\x06"
     engineProtectMAP  = bits,     U08,       84, [1:1]
     engineProtectOil  = bits,     U08,       84, [2:2]
     engineProtectAFR  = bits,     U08,       84, [3:3]
-    engineProtectOth  = bits,     U08,       84, [4:7] ; Unused for now
+    engineProtectOth  = bits,     U08,       84, [4:6] ; Unused for now
+    IOError           = bits,     U08,       84, [7:7]
    unused1          = scalar,   U08,    84, "ADC",1.000, 0.000
    fuelLoad         = scalar,   S16,    85, { bitStringValue( algorithmUnits , algorithm  ) }, 1.000, 0.000
    ignLoad          = scalar,   S16,    87, { bitStringValue( algorithmUnits , ignAlgorithm  ) }, 1.000, 0.000
diff --git a/speeduino/globals.h b/speeduino/globals.h
index 4b06f705..caed2535 100644
--- a/speeduino/globals.h
+++ b/speeduino/globals.h
@@ -241,6 +241,7 @@
 #define PROTECT_CUT_IGN     1
 #define PROTECT_CUT_FUEL    2
 #define PROTECT_CUT_BOTH    3
+#define PROTECT_IO_ERROR    7
 
 #define AE_MODE_TPS         0
 #define AE_MODE_MAP         1
@@ -495,8 +496,8 @@ extern volatile byte LOOP_TIMER;
 #define pinIsInjector(pin)  ( ((pin) == pinInjector1) || ((pin) == pinInjector2) || ((pin) == pinInjector3) || ((pin) == pinInjector4) || ((pin) == pinInjector5) || ((pin) == pinInjector6) || ((pin) == pinInjector7) || ((pin) == pinInjector8) )
 #define pinIsIgnition(pin)  ( ((pin) == pinCoil1) || ((pin) == pinCoil2) || ((pin) == pinCoil3) || ((pin) == pinCoil4) || ((pin) == pinCoil5) || ((pin) == pinCoil6) || ((pin) == pinCoil7) || ((pin) == pinCoil8) )
 #define pinIsSensor(pin)    ( ((pin) == pinCLT) || ((pin) == pinIAT) || ((pin) == pinMAP) || ((pin) == pinTPS) || ((pin) == pinO2) || ((pin) == pinBat) )
-#define pinIsUsed(pin)      ( pinIsInjector((pin)) || pinIsIgnition((pin)) || pinIsSensor((pin)) )
 #define pinIsOutput(pin)    ( ((pin) == pinFuelPump) || ((pin) == pinFan) || ((pin) == pinVVT_1) || ((pin) == pinVVT_2) || ((pin) == pinBoost) || ((pin) == pinIdle1) || ((pin) == pinIdle2) || ((pin) == pinTachOut) )
+#define pinIsUsed(pin)      ( pinIsInjector((pin)) || pinIsIgnition((pin)) || pinIsSensor((pin)) || pinIsOutput((pin)) )
 
 //The status struct contains the current values for all 'live' variables
 //In current version this is 64 bytes
diff --git a/speeduino/init.ino b/speeduino/init.ino
index f5e811ce..0e0e375f 100644
--- a/speeduino/init.ino
+++ b/speeduino/init.ino
@@ -265,6 +265,7 @@ void initialiseAll()
     initialiseFan();
     initialiseAuxPWM();
     initialiseCorrections();
+    BIT_CLEAR(currentStatus.engineProtectStatus, PROTECT_IO_ERROR); //Clear the I/O error bit. The bit will be set in initialiseADC() if there is problem in there.
     initialiseADC();
     initialiseProgrammableIO();
 
diff --git a/speeduino/sensors.ino b/speeduino/sensors.ino
index 01dd3515..417b2dda 100644
--- a/speeduino/sensors.ino
+++ b/speeduino/sensors.ino
@@ -76,7 +76,7 @@ void initialiseADC()
       if( pinIsUsed(pinNumber) )
       {
         //Do nothing here as the pin is already in use.
-        //Need some method of reporting this back to the user
+        BIT_SET(currentStatus.engineProtectStatus, PROTECT_IO_ERROR); //Tell user that there is problem by lighting up the I/O error indicator
       }
       else
       {
@@ -94,7 +94,7 @@ void initialiseADC()
        if( pinIsUsed(pinNumber) )
        {
          //Do nothing here as the pin is already in use.
-         //Need some method of reporting this back to the user
+        BIT_SET(currentStatus.engineProtectStatus, PROTECT_IO_ERROR); //Tell user that there is problem by lighting up the I/O error indicator
        }
        else
        {