diff --git a/src/logic/error_codes.h b/src/logic/error_codes.h
index 6ca9148..d152c1f 100644
--- a/src/logic/error_codes.h
+++ b/src/logic/error_codes.h
@@ -26,29 +26,35 @@ enum class ErrorCode : uint_fast16_t {
 
     FILAMENT_ALREADY_LOADED = 0x8005, ///< cannot perform operation LoadFilament or move the selector as the filament is already loaded
 
-    MMU_NOT_RESPONDING = 0x801e, ///< internal error of the printer - communication with the MMU is not working
+    MMU_NOT_RESPONDING = 0x802e, ///< internal error of the printer - communication with the MMU is not working
 
-    INTERNAL = 0x801f, ///< internal runtime error (software)
+    INTERNAL = 0x802f, ///< internal runtime error (software)
 
     // TMC bit masks
 
-    TMC_PULLEY_BIT = 0x0020, ///< TMC Pulley bit
-    TMC_SELECTOR_BIT = 0x0040, ///< TMC Pulley bit
-    TMC_IDLER_BIT = 0x0080, ///< TMC Pulley bit
+    TMC_PULLEY_BIT = 0x0040, ///< TMC Pulley bit
+    TMC_SELECTOR_BIT = 0x0080, ///< TMC Pulley bit
+    TMC_IDLER_BIT = 0x0100, ///< TMC Pulley bit
 
-    TMC_IOIN_MISMATCH = 0x8100, ///< TMC driver init error - TMC dead or bad communication
+    TMC_IOIN_MISMATCH = 0x8200, ///< TMC driver init error - TMC dead or bad communication
 
     /// TMC driver reset - recoverable, we just need to rehome the axis
     /// Idler: can be rehomed any time
     /// Selector: if there is a filament, remove it and rehome, if there is no filament, just rehome
     /// Pulley: do nothing - for the loading sequence - just restart and move slowly, for the unload sequence just restart
-    TMC_RESET = 0x8200,
+    TMC_RESET = 0x8400,
 
-    TMC_UNDERVOLTAGE_ON_CHARGE_PUMP = 0x8400, ///< not enough current for the TMC, NOT RECOVERABLE
+    TMC_UNDERVOLTAGE_ON_CHARGE_PUMP = 0x8800, ///< not enough current for the TMC, NOT RECOVERABLE
 
-    TMC_SERIOUS_COIL_ERROR = 0x8800, ///< TMC driver serious error coil A or coil B - dangerous to recover
-    TMC_COIL_ERROR = 0x9000, ///< TMC driver error coil A or coil B - can be recovered
+    TMC_SHORT_TO_GROUND = 0x9000, ///< TMC driver serious error - short to ground on coil A or coil B - dangerous to recover
 
-    TMC_OVER_TEMPERATURE_WARN = 0xA000, ///< TMC driver over temperature warning - can be recovered by restarting the driver
-    TMC_OVER_TEMPERATURE_ERROR = 0xC000, ///< TMC driver over temperature error - the TMC probably fried
+    /// TMC driver over temperature warning - can be recovered by restarting the driver.
+    /// If this error happens, we should probably go into the error state as soon as the current command is finished.
+    /// The driver technically still works at this point.
+    TMC_OVER_TEMPERATURE_WARN = 0xA000,
+
+    /// TMC driver over temperature error - we really shouldn't ever reach this error.
+    /// It can still be recovered if the driver cools down below 120C.
+    /// The driver needs to be disabled and enabled again for operation to resume after this error is cleared.
+    TMC_OVER_TEMPERATURE_ERROR = 0xC000,
 };