diff --git a/Marlin/src/core/utility.h b/Marlin/src/core/utility.h
index b845cd0412..10c8201610 100644
--- a/Marlin/src/core/utility.h
+++ b/Marlin/src/core/utility.h
@@ -79,7 +79,7 @@ constexpr uint8_t ui8_to_percent(const uint8_t i) { return (int(i) * 100 + 127)
 
 // Axis names for G-code parsing, reports, etc.
 const xyze_char_t axis_codes LOGICAL_AXIS_ARRAY('E', 'X', 'Y', 'Z', AXIS4_NAME, AXIS5_NAME, AXIS6_NAME, AXIS7_NAME, AXIS8_NAME, AXIS9_NAME);
-#if NUM_AXES <= XYZ
+#if NUM_AXES <= XYZ && !HAS_EXTRUDERS
   #define AXIS_CHAR(A) ((char)('X' + A))
   #define IAXIS_CHAR AXIS_CHAR
 #else
diff --git a/Marlin/src/feature/encoder_i2c.cpp b/Marlin/src/feature/encoder_i2c.cpp
index c1dbb906fd..092ce0f8b8 100644
--- a/Marlin/src/feature/encoder_i2c.cpp
+++ b/Marlin/src/feature/encoder_i2c.cpp
@@ -49,7 +49,7 @@ void I2CPositionEncoder::init(const uint8_t address, const AxisEnum axis) {
 
   initialized = true;
 
-  SERIAL_ECHOLNPGM("Setting up encoder on ", AS_CHAR(axis_codes[encoderAxis]), " axis, addr = ", address);
+  SERIAL_ECHOLNPGM("Setting up encoder on ", AS_CHAR(AXIS_CHAR(encoderAxis)), " axis, addr = ", address);
 
   position = get_position();
 }
@@ -67,7 +67,7 @@ void I2CPositionEncoder::update() {
     /*
     if (trusted) { //commented out as part of the note below
       trusted = false;
-      SERIAL_ECHOLNPGM("Fault detected on ", AS_CHAR(axis_codes[encoderAxis]), " axis encoder. Disengaging error correction until module is trusted again.");
+      SERIAL_ECHOLNPGM("Fault detected on ", AS_CHAR(AXIS_CHAR(encoderAxis)), " axis encoder. Disengaging error correction until module is trusted again.");
     }
     */
     return;
@@ -92,7 +92,7 @@ void I2CPositionEncoder::update() {
       if (millis() - lastErrorTime > I2CPE_TIME_TRUSTED) {
         trusted = true;
 
-        SERIAL_ECHOLNPGM("Untrusted encoder module on ", AS_CHAR(axis_codes[encoderAxis]), " axis has been fault-free for set duration, reinstating error correction.");
+        SERIAL_ECHOLNPGM("Untrusted encoder module on ", AS_CHAR(AXIS_CHAR(encoderAxis)), " axis has been fault-free for set duration, reinstating error correction.");
 
         //the encoder likely lost its place when the error occurred, so we'll reset and use the printer's
         //idea of where it the axis is to re-initialize
@@ -172,7 +172,7 @@ void I2CPositionEncoder::update() {
             float sumP = 0;
             LOOP_L_N(i, I2CPE_ERR_PRST_ARRAY_SIZE) sumP += errPrst[i];
             const int32_t errorP = int32_t(sumP * RECIPROCAL(I2CPE_ERR_PRST_ARRAY_SIZE));
-            SERIAL_CHAR(axis_codes[encoderAxis]);
+            SERIAL_CHAR(AXIS_CHAR(encoderAxis));
             SERIAL_ECHOLNPGM(" : CORRECT ERR ", errorP * planner.mm_per_step[encoderAxis], "mm");
             babystep.add_steps(encoderAxis, -LROUND(errorP));
             errPrstIdx = 0;
@@ -192,7 +192,7 @@ void I2CPositionEncoder::update() {
     if (ABS(error) > I2CPE_ERR_CNT_THRESH * planner.settings.axis_steps_per_mm[encoderAxis]) {
       const millis_t ms = millis();
       if (ELAPSED(ms, nextErrorCountTime)) {
-        SERIAL_CHAR(axis_codes[encoderAxis]);
+        SERIAL_CHAR(AXIS_CHAR(encoderAxis));
         SERIAL_ECHOLNPGM(" : LARGE ERR ", error, "; diffSum=", diffSum);
         errorCount++;
         nextErrorCountTime = ms + I2CPE_ERR_CNT_DEBOUNCE_MS;
@@ -212,7 +212,7 @@ void I2CPositionEncoder::set_homed() {
     homed = trusted = true;
 
     #ifdef I2CPE_DEBUG
-      SERIAL_CHAR(axis_codes[encoderAxis]);
+      SERIAL_CHAR(AXIS_CHAR(encoderAxis));
       SERIAL_ECHOLNPGM(" axis encoder homed, offset of ", zeroOffset, " ticks.");
     #endif
   }
@@ -223,7 +223,7 @@ void I2CPositionEncoder::set_unhomed() {
   homed = trusted = false;
 
   #ifdef I2CPE_DEBUG
-    SERIAL_CHAR(axis_codes[encoderAxis]);
+    SERIAL_CHAR(AXIS_CHAR(encoderAxis));
     SERIAL_ECHOLNPGM(" axis encoder unhomed.");
   #endif
 }
@@ -231,7 +231,7 @@ void I2CPositionEncoder::set_unhomed() {
 bool I2CPositionEncoder::passes_test(const bool report) {
   if (report) {
     if (H != I2CPE_MAG_SIG_GOOD) SERIAL_ECHOPGM("Warning. ");
-    SERIAL_CHAR(axis_codes[encoderAxis]);
+    SERIAL_CHAR(AXIS_CHAR(encoderAxis));
     serial_ternary(H == I2CPE_MAG_SIG_BAD, F(" axis "), F("magnetic strip "), F("encoder "));
     switch (H) {
       case I2CPE_MAG_SIG_GOOD:
@@ -252,7 +252,7 @@ float I2CPositionEncoder::get_axis_error_mm(const bool report) {
               error = ABS(diff) > 10000 ? 0 : diff; // Huge error is a bad reading
 
   if (report) {
-    SERIAL_CHAR(axis_codes[encoderAxis]);
+    SERIAL_CHAR(AXIS_CHAR(encoderAxis));
     SERIAL_ECHOLNPGM(" axis target=", target, "mm; actual=", actual, "mm; err=", error, "mm");
   }
 
@@ -262,7 +262,7 @@ float I2CPositionEncoder::get_axis_error_mm(const bool report) {
 int32_t I2CPositionEncoder::get_axis_error_steps(const bool report) {
   if (!active) {
     if (report) {
-      SERIAL_CHAR(axis_codes[encoderAxis]);
+      SERIAL_CHAR(AXIS_CHAR(encoderAxis));
       SERIAL_ECHOLNPGM(" axis encoder not active!");
     }
     return 0;
@@ -287,7 +287,7 @@ int32_t I2CPositionEncoder::get_axis_error_steps(const bool report) {
   errorPrev = error;
 
   if (report) {
-    SERIAL_CHAR(axis_codes[encoderAxis]);
+    SERIAL_CHAR(AXIS_CHAR(encoderAxis));
     SERIAL_ECHOLNPGM(" axis target=", target, "; actual=", encoderCountInStepperTicksScaled, "; err=", error);
   }
 
@@ -657,7 +657,7 @@ void I2CPositionEncodersMgr::report_position(const int8_t idx, const bool units,
   else {
     if (noOffset) {
       const int32_t raw_count = encoders[idx].get_raw_count();
-      SERIAL_CHAR(axis_codes[encoders[idx].get_axis()], ' ');
+      SERIAL_CHAR(AXIS_CHAR(encoders[idx).get_axis()], ' ');
 
       for (uint8_t j = 31; j > 0; j--)
         SERIAL_ECHO((bool)(0x00000001 & (raw_count >> j)));
@@ -712,7 +712,7 @@ void I2CPositionEncodersMgr::change_module_address(const uint8_t oldaddr, const
   // and enable it (it will likely have failed initialization on power-up, before the address change).
   const int8_t idx = idx_from_addr(newaddr);
   if (idx >= 0 && !encoders[idx].get_active()) {
-    SERIAL_CHAR(axis_codes[encoders[idx].get_axis()]);
+    SERIAL_CHAR(AXIS_CHAR(encoders[idx).get_axis()]);
     SERIAL_ECHOLNPGM(" axis encoder was not detected on printer startup. Trying again.");
     encoders[idx].set_active(encoders[idx].passes_test(true));
   }
@@ -814,7 +814,7 @@ void I2CPositionEncodersMgr::M860() {
 
   if (I2CPE_idx == 0xFF) {
     LOOP_LOGICAL_AXES(i) {
-      if (!I2CPE_anyaxis || parser.seen_test(axis_codes[i])) {
+      if (!I2CPE_anyaxis || parser.seen_test(AXIS_CHAR(i))) {
         const uint8_t idx = idx_from_axis(AxisEnum(i));
         if ((int8_t)idx >= 0) report_position(idx, hasU, hasO);
       }
@@ -841,7 +841,7 @@ void I2CPositionEncodersMgr::M861() {
 
   if (I2CPE_idx == 0xFF) {
     LOOP_LOGICAL_AXES(i) {
-      if (!I2CPE_anyaxis || parser.seen(axis_codes[i])) {
+      if (!I2CPE_anyaxis || parser.seen(AXIS_CHAR(i))) {
         const uint8_t idx = idx_from_axis(AxisEnum(i));
         if ((int8_t)idx >= 0) report_status(idx);
       }
@@ -869,7 +869,7 @@ void I2CPositionEncodersMgr::M862() {
 
   if (I2CPE_idx == 0xFF) {
     LOOP_LOGICAL_AXES(i) {
-      if (!I2CPE_anyaxis || parser.seen(axis_codes[i])) {
+      if (!I2CPE_anyaxis || parser.seen(AXIS_CHAR(i))) {
         const uint8_t idx = idx_from_axis(AxisEnum(i));
         if ((int8_t)idx >= 0) test_axis(idx);
       }
@@ -900,7 +900,7 @@ void I2CPositionEncodersMgr::M863() {
 
   if (I2CPE_idx == 0xFF) {
     LOOP_LOGICAL_AXES(i) {
-      if (!I2CPE_anyaxis || parser.seen(axis_codes[i])) {
+      if (!I2CPE_anyaxis || parser.seen(AXIS_CHAR(i))) {
         const uint8_t idx = idx_from_axis(AxisEnum(i));
         if ((int8_t)idx >= 0) calibrate_steps_mm(idx, iterations);
       }
@@ -976,7 +976,7 @@ void I2CPositionEncodersMgr::M865() {
 
   if (!I2CPE_addr) {
     LOOP_LOGICAL_AXES(i) {
-      if (!I2CPE_anyaxis || parser.seen(axis_codes[i])) {
+      if (!I2CPE_anyaxis || parser.seen(AXIS_CHAR(i))) {
         const uint8_t idx = idx_from_axis(AxisEnum(i));
         if ((int8_t)idx >= 0) report_module_firmware(encoders[idx].get_address());
       }
@@ -1007,7 +1007,7 @@ void I2CPositionEncodersMgr::M866() {
 
   if (I2CPE_idx == 0xFF) {
     LOOP_LOGICAL_AXES(i) {
-      if (!I2CPE_anyaxis || parser.seen(axis_codes[i])) {
+      if (!I2CPE_anyaxis || parser.seen(AXIS_CHAR(i))) {
         const uint8_t idx = idx_from_axis(AxisEnum(i));
         if ((int8_t)idx >= 0) {
           if (hasR)
@@ -1045,7 +1045,7 @@ void I2CPositionEncodersMgr::M867() {
 
   if (I2CPE_idx == 0xFF) {
     LOOP_LOGICAL_AXES(i) {
-      if (!I2CPE_anyaxis || parser.seen(axis_codes[i])) {
+      if (!I2CPE_anyaxis || parser.seen(AXIS_CHAR(i))) {
         const uint8_t idx = idx_from_axis(AxisEnum(i));
         if ((int8_t)idx >= 0) {
           const bool ena = onoff == -1 ? !encoders[I2CPE_idx].get_ec_enabled() : !!onoff;
@@ -1081,7 +1081,7 @@ void I2CPositionEncodersMgr::M868() {
 
   if (I2CPE_idx == 0xFF) {
     LOOP_LOGICAL_AXES(i) {
-      if (!I2CPE_anyaxis || parser.seen(axis_codes[i])) {
+      if (!I2CPE_anyaxis || parser.seen(AXIS_CHAR(i))) {
         const uint8_t idx = idx_from_axis(AxisEnum(i));
         if ((int8_t)idx >= 0) {
           if (newThreshold != -9999)
@@ -1115,7 +1115,7 @@ void I2CPositionEncodersMgr::M869() {
 
   if (I2CPE_idx == 0xFF) {
     LOOP_LOGICAL_AXES(i) {
-      if (!I2CPE_anyaxis || parser.seen(axis_codes[i])) {
+      if (!I2CPE_anyaxis || parser.seen(AXIS_CHAR(i))) {
         const uint8_t idx = idx_from_axis(AxisEnum(i));
         if ((int8_t)idx >= 0) report_error(idx);
       }
diff --git a/Marlin/src/feature/encoder_i2c.h b/Marlin/src/feature/encoder_i2c.h
index 50fb27a135..f25fe2ea6b 100644
--- a/Marlin/src/feature/encoder_i2c.h
+++ b/Marlin/src/feature/encoder_i2c.h
@@ -261,32 +261,32 @@ class I2CPositionEncodersMgr {
 
     static void report_error_count(const int8_t idx, const AxisEnum axis) {
       CHECK_IDX();
-      SERIAL_ECHOLNPGM("Error count on ", AS_CHAR(axis_codes[axis]), " axis is ", encoders[idx].get_error_count());
+      SERIAL_ECHOLNPGM("Error count on ", AS_CHAR(AXIS_CHAR(axis)), " axis is ", encoders[idx].get_error_count());
     }
 
     static void reset_error_count(const int8_t idx, const AxisEnum axis) {
       CHECK_IDX();
       encoders[idx].set_error_count(0);
-      SERIAL_ECHOLNPGM("Error count on ", AS_CHAR(axis_codes[axis]), " axis has been reset.");
+      SERIAL_ECHOLNPGM("Error count on ", AS_CHAR(AXIS_CHAR(axis)), " axis has been reset.");
     }
 
     static void enable_ec(const int8_t idx, const bool enabled, const AxisEnum axis) {
       CHECK_IDX();
       encoders[idx].set_ec_enabled(enabled);
-      SERIAL_ECHOPGM("Error correction on ", AS_CHAR(axis_codes[axis]));
+      SERIAL_ECHOPGM("Error correction on ", AS_CHAR(AXIS_CHAR(axis)));
       SERIAL_ECHO_TERNARY(encoders[idx].get_ec_enabled(), " axis is ", "en", "dis", "abled.\n");
     }
 
     static void set_ec_threshold(const int8_t idx, const float newThreshold, const AxisEnum axis) {
       CHECK_IDX();
       encoders[idx].set_ec_threshold(newThreshold);
-      SERIAL_ECHOLNPGM("Error correct threshold for ", AS_CHAR(axis_codes[axis]), " axis set to ", newThreshold, "mm.");
+      SERIAL_ECHOLNPGM("Error correct threshold for ", AS_CHAR(AXIS_CHAR(axis)), " axis set to ", newThreshold, "mm.");
     }
 
     static void get_ec_threshold(const int8_t idx, const AxisEnum axis) {
       CHECK_IDX();
       const float threshold = encoders[idx].get_ec_threshold();
-      SERIAL_ECHOLNPGM("Error correct threshold for ", AS_CHAR(axis_codes[axis]), " axis is ", threshold, "mm.");
+      SERIAL_ECHOLNPGM("Error correct threshold for ", AS_CHAR(AXIS_CHAR(axis)), " axis is ", threshold, "mm.");
     }
 
     static int8_t idx_from_axis(const AxisEnum axis) {
diff --git a/Marlin/src/gcode/config/M200-M205.cpp b/Marlin/src/gcode/config/M200-M205.cpp
index fe9ed132b8..8b50437eef 100644
--- a/Marlin/src/gcode/config/M200-M205.cpp
+++ b/Marlin/src/gcode/config/M200-M205.cpp
@@ -134,7 +134,7 @@ void GcodeSuite::M201() {
   #endif
 
   LOOP_LOGICAL_AXES(i) {
-    if (parser.seenval(axis_codes[i])) {
+    if (parser.seenval(AXIS_CHAR(i))) {
       const uint8_t a = TERN(HAS_EXTRUDERS, (i == E_AXIS ? uint8_t(E_AXIS_N(target_extruder)) : i), i);
       planner.set_max_acceleration(a, parser.value_axis_units((AxisEnum)a));
     }
@@ -183,7 +183,7 @@ void GcodeSuite::M203() {
   if (target_extruder < 0) return;
 
   LOOP_LOGICAL_AXES(i)
-    if (parser.seenval(axis_codes[i])) {
+    if (parser.seenval(AXIS_CHAR(i))) {
       const uint8_t a = TERN(HAS_EXTRUDERS, (i == E_AXIS ? uint8_t(E_AXIS_N(target_extruder)) : i), i);
       planner.set_max_feedrate(a, parser.value_axis_units((AxisEnum)a));
     }
diff --git a/Marlin/src/gcode/config/M92.cpp b/Marlin/src/gcode/config/M92.cpp
index cca4f7f12a..3d1a9cb7ce 100644
--- a/Marlin/src/gcode/config/M92.cpp
+++ b/Marlin/src/gcode/config/M92.cpp
@@ -47,7 +47,7 @@ void GcodeSuite::M92() {
     return M92_report(true, target_extruder);
 
   LOOP_LOGICAL_AXES(i) {
-    if (parser.seenval(axis_codes[i])) {
+    if (parser.seenval(AXIS_CHAR(i))) {
       if (TERN1(HAS_EXTRUDERS, i != E_AXIS))
         planner.settings.axis_steps_per_mm[i] = parser.value_per_axis_units((AxisEnum)i);
       else {
diff --git a/Marlin/src/gcode/control/M17_M18_M84.cpp b/Marlin/src/gcode/control/M17_M18_M84.cpp
index 82cf790a06..81fa3365e9 100644
--- a/Marlin/src/gcode/control/M17_M18_M84.cpp
+++ b/Marlin/src/gcode/control/M17_M18_M84.cpp
@@ -75,7 +75,7 @@ void do_enable(const stepper_flags_t to_enable) {
   LOOP_NUM_AXES(a) {
     if (TEST(shall_enable, a)) {
       stepper.enable_axis(AxisEnum(a));         // Mark and enable the requested axis
-      DEBUG_ECHOLNPGM("Enabled ", axis_codes[a], " (", a, ") with overlap ", hex_word(enable_overlap[a]), " ... Enabled: ", hex_word(stepper.axis_enabled.bits));
+      DEBUG_ECHOLNPGM("Enabled ", AXIS_CHAR(a), " (", a, ") with overlap ", hex_word(enable_overlap[a]), " ... Enabled: ", hex_word(stepper.axis_enabled.bits));
       also_enabled |= enable_overlap[a];
     }
   }
@@ -157,7 +157,7 @@ void try_to_disable(const stepper_flags_t to_disable) {
   // Attempt to disable all flagged axes
   LOOP_NUM_AXES(a)
     if (TEST(to_disable.bits, a)) {
-      DEBUG_ECHOPGM("Try to disable ", axis_codes[a], " (", a, ") with overlap ", hex_word(enable_overlap[a]), " ... ");
+      DEBUG_ECHOPGM("Try to disable ", AXIS_CHAR(a), " (", a, ") with overlap ", hex_word(enable_overlap[a]), " ... ");
       if (stepper.disable_axis(AxisEnum(a))) {            // Mark the requested axis and request to disable
         DEBUG_ECHOPGM("OK");
         still_enabled &= ~(_BV(a) | enable_overlap[a]);   // If actually disabled, clear one or more tracked bits
@@ -195,7 +195,7 @@ void try_to_disable(const stepper_flags_t to_disable) {
   // If any of the requested axes are still enabled, give a warning
   LOOP_NUM_AXES(a) {
     if (TEST(still_enabled, a)) {
-      SERIAL_CHAR(axis_codes[a]);
+      SERIAL_CHAR(AXIS_CHAR(a));
       overlap_warning(stepper.axis_enabled.bits & enable_overlap[a]);
     }
   }
diff --git a/Marlin/src/gcode/control/M350_M351.cpp b/Marlin/src/gcode/control/M350_M351.cpp
index a92238e4bb..68e49ee50b 100644
--- a/Marlin/src/gcode/control/M350_M351.cpp
+++ b/Marlin/src/gcode/control/M350_M351.cpp
@@ -40,21 +40,21 @@ void GcodeSuite::M350() {
 }
 
 /**
- * M351: Toggle MS1 MS2 pins directly with axis codes X Y Z E B
+ * M351: Toggle MS1 MS2 pins directly with axis codes X Y Z . . . E [B]
  *       S# determines MS1, MS2 or MS3, X# sets the pin high/low.
  */
 void GcodeSuite::M351() {
   if (parser.seenval('S')) switch (parser.value_byte()) {
     case 1:
-      LOOP_LOGICAL_AXES(i) if (parser.seenval(axis_codes[i])) stepper.microstep_ms(i, parser.value_byte(), -1, -1);
+      LOOP_LOGICAL_AXES(i) if (parser.seenval(AXIS_CHAR(i))) stepper.microstep_ms(i, parser.value_byte(), -1, -1);
       if (parser.seenval('B')) stepper.microstep_ms(4, parser.value_byte(), -1, -1);
       break;
     case 2:
-      LOOP_LOGICAL_AXES(i) if (parser.seenval(axis_codes[i])) stepper.microstep_ms(i, -1, parser.value_byte(), -1);
+      LOOP_LOGICAL_AXES(i) if (parser.seenval(AXIS_CHAR(i))) stepper.microstep_ms(i, -1, parser.value_byte(), -1);
       if (parser.seenval('B')) stepper.microstep_ms(4, -1, parser.value_byte(), -1);
       break;
     case 3:
-      LOOP_LOGICAL_AXES(i) if (parser.seenval(axis_codes[i])) stepper.microstep_ms(i, -1, -1, parser.value_byte());
+      LOOP_LOGICAL_AXES(i) if (parser.seenval(AXIS_CHAR(i))) stepper.microstep_ms(i, -1, -1, parser.value_byte());
       if (parser.seenval('B')) stepper.microstep_ms(4, -1, -1, parser.value_byte());
       break;
   }
diff --git a/Marlin/src/gcode/feature/L6470/M906.cpp b/Marlin/src/gcode/feature/L6470/M906.cpp
index 0aefc03f7c..f89fe8b927 100644
--- a/Marlin/src/gcode/feature/L6470/M906.cpp
+++ b/Marlin/src/gcode/feature/L6470/M906.cpp
@@ -211,7 +211,7 @@ void L64XX_report_current(L64XX &motor, const L64XX_axis_t axis) {
  *     1 - monitor only X2, Y2, Z2
  *     2 - monitor only Z3
  *     3 - monitor only Z4
- * Xxxx, Yxxx, Zxxx, Exxx - axis to change (optional)
+ * Xxxx, Yxxx, Zxxx, Axxx, Bxxx, Cxxx, Uxxx, Vxxx, Wxxx, Exxx - axis to change (optional)
  *     L6474 - current in mA (4A max)
  *     All others - 0-255
  *
@@ -236,7 +236,7 @@ void GcodeSuite::M906() {
     constexpr int8_t index = -1;
   #endif
 
-  LOOP_LOGICAL_AXES(i) if (uint16_t value = parser.intval(axis_codes[i])) {
+  LOOP_LOGICAL_AXES(i) if (uint16_t value = parser.intval(AXIS_CHAR(i))) {
 
     report_current = false;
 
diff --git a/Marlin/src/gcode/feature/trinamic/M122.cpp b/Marlin/src/gcode/feature/trinamic/M122.cpp
index fdab548774..2941632406 100644
--- a/Marlin/src/gcode/feature/trinamic/M122.cpp
+++ b/Marlin/src/gcode/feature/trinamic/M122.cpp
@@ -35,7 +35,7 @@ void GcodeSuite::M122() {
   xyze_bool_t print_axis = ARRAY_N_1(LOGICAL_AXES, false);
 
   bool print_all = true;
-  LOOP_LOGICAL_AXES(i) if (parser.seen_test(axis_codes[i])) { print_axis[i] = true; print_all = false; }
+  LOOP_LOGICAL_AXES(i) if (parser.seen_test(AXIS_CHAR(i))) { print_axis[i] = true; print_all = false; }
 
   if (print_all) LOOP_LOGICAL_AXES(i) print_axis[i] = true;
 
diff --git a/Marlin/src/gcode/feature/trinamic/M569.cpp b/Marlin/src/gcode/feature/trinamic/M569.cpp
index 4247eaecdc..f4c4967142 100644
--- a/Marlin/src/gcode/feature/trinamic/M569.cpp
+++ b/Marlin/src/gcode/feature/trinamic/M569.cpp
@@ -53,7 +53,7 @@ static void set_stealth_status(const bool enable, const int8_t eindex) {
     constexpr int8_t index = -1;
   #endif
 
-  LOOP_LOGICAL_AXES(i) if (parser.seen(axis_codes[i])) {
+  LOOP_LOGICAL_AXES(i) if (parser.seen(AXIS_CHAR(i))) {
     switch (i) {
       case X_AXIS:
         TERN_(X_HAS_STEALTHCHOP,  if (index < 0 || index == 0) TMC_SET_STEALTH(X));
diff --git a/Marlin/src/gcode/feature/trinamic/M906.cpp b/Marlin/src/gcode/feature/trinamic/M906.cpp
index 4822b8e268..b2cab13553 100644
--- a/Marlin/src/gcode/feature/trinamic/M906.cpp
+++ b/Marlin/src/gcode/feature/trinamic/M906.cpp
@@ -66,7 +66,7 @@ void GcodeSuite::M906() {
     constexpr int8_t index = -1;
   #endif
 
-  LOOP_LOGICAL_AXES(i) if (uint16_t value = parser.intval(axis_codes[i])) {
+  LOOP_LOGICAL_AXES(i) if (uint16_t value = parser.intval(AXIS_CHAR(i))) {
     report = false;
     switch (i) {
       #if AXIS_IS_TMC(X) || AXIS_IS_TMC(X2)
diff --git a/Marlin/src/gcode/feature/trinamic/M911-M914.cpp b/Marlin/src/gcode/feature/trinamic/M911-M914.cpp
index 61adba2388..0a9d1760e9 100644
--- a/Marlin/src/gcode/feature/trinamic/M911-M914.cpp
+++ b/Marlin/src/gcode/feature/trinamic/M911-M914.cpp
@@ -288,7 +288,7 @@
     #elif AXIS_IS_TMC(X) || AXIS_IS_TMC(Y) || AXIS_IS_TMC(Z)
       constexpr uint8_t index = 0;
     #endif
-    LOOP_LOGICAL_AXES(i) if (int32_t value = parser.longval(axis_codes[i])) {
+    LOOP_LOGICAL_AXES(i) if (int32_t value = parser.longval(AXIS_CHAR(i))) {
       report = false;
       switch (i) {
         #if X_HAS_STEALTHCHOP || X2_HAS_STEALTHCHOP
diff --git a/Marlin/src/gcode/feature/trinamic/M919.cpp b/Marlin/src/gcode/feature/trinamic/M919.cpp
index d4ba4f74ea..6f3dcf729a 100644
--- a/Marlin/src/gcode/feature/trinamic/M919.cpp
+++ b/Marlin/src/gcode/feature/trinamic/M919.cpp
@@ -112,13 +112,13 @@ void GcodeSuite::M919() {
     int8_t eindex = -1;
   #endif
   bool report = true;
-  LOOP_LOGICAL_AXES(i) if (parser.seen_test(axis_codes[i])) {
+  LOOP_LOGICAL_AXES(i) if (parser.seen_test(AXIS_CHAR(i))) {
     report = false;
 
     // Get the chopper timing for the specified axis and index
     switch (i) {
       default: // A specified axis isn't Trinamic
-        SERIAL_ECHOLNPGM("?Axis ", AS_CHAR(axis_codes[i]), " has no TMC drivers.");
+        SERIAL_ECHOLNPGM("?Axis ", AS_CHAR(AXIS_CHAR(i)), " has no TMC drivers.");
         break;
 
       #if AXIS_IS_TMC(X) || AXIS_IS_TMC(X2)
diff --git a/Marlin/src/gcode/geometry/G92.cpp b/Marlin/src/gcode/geometry/G92.cpp
index 8e3cad2422..58ed26a15a 100644
--- a/Marlin/src/gcode/geometry/G92.cpp
+++ b/Marlin/src/gcode/geometry/G92.cpp
@@ -74,7 +74,7 @@ void GcodeSuite::G92() {
     #if ENABLED(POWER_LOSS_RECOVERY)
       case 9:                                                         // G92.9 - Set Current Position directly (like Marlin 1.0)
         LOOP_LOGICAL_AXES(i) {
-          if (parser.seenval(axis_codes[i])) {
+          if (parser.seenval(AXIS_CHAR(i))) {
             if (TERN1(HAS_EXTRUDERS, i != E_AXIS))
               sync_XYZE = true;
             else {
@@ -88,7 +88,7 @@ void GcodeSuite::G92() {
 
     case 0:
       LOOP_LOGICAL_AXES(i) {
-        if (parser.seenval(axis_codes[i])) {
+        if (parser.seenval(AXIS_CHAR(i))) {
           const float l = parser.value_axis_units((AxisEnum)i),       // Given axis coordinate value, converted to millimeters
                       v = TERN0(HAS_EXTRUDERS, i == E_AXIS) ? l : LOGICAL_TO_NATIVE(l, i),  // Axis position in NATIVE space (applying the existing offset)
                       d = v - current_position[i];                    // How much is the current axis position altered by?
diff --git a/Marlin/src/lcd/dogm/status_screen_DOGM.cpp b/Marlin/src/lcd/dogm/status_screen_DOGM.cpp
index 7e5329aeef..010a1397f6 100644
--- a/Marlin/src/lcd/dogm/status_screen_DOGM.cpp
+++ b/Marlin/src/lcd/dogm/status_screen_DOGM.cpp
@@ -432,7 +432,7 @@ FORCE_INLINE void _draw_axis_value(const AxisEnum axis, const char *value, const
   const bool is_inch = parser.using_inch_units();
   const AxisEnum a = TERN(LCD_SHOW_E_TOTAL, axis == E_AXIS ? X_AXIS : axis, axis);
   const uint8_t offs = a * (is_inch ? XYZ_SPACING_IN : XYZ_SPACING);
-  lcd_put_wchar((is_inch ? X_LABEL_POS_IN : X_LABEL_POS) + offs, XYZ_BASELINE, axis_codes[axis]);
+  lcd_put_wchar((is_inch ? X_LABEL_POS_IN : X_LABEL_POS) + offs, XYZ_BASELINE, AXIS_CHAR(axis));
   lcd_moveto((is_inch ? X_VALUE_POS_IN : X_VALUE_POS) + offs, XYZ_BASELINE);
 
   if (blink)
diff --git a/Marlin/src/lcd/e3v2/marlinui/dwin_string.cpp b/Marlin/src/lcd/e3v2/marlinui/dwin_string.cpp
index d631cbfafc..30e86270c7 100644
--- a/Marlin/src/lcd/e3v2/marlinui/dwin_string.cpp
+++ b/Marlin/src/lcd/e3v2/marlinui/dwin_string.cpp
@@ -72,7 +72,7 @@ void DWIN_String::add(const char *tpl, const int8_t index, const char *cstr/*=nu
     else if (ch == '$' && cstr)
       add(cstr);
     else if (ch == '@')
-      add_character(axis_codes[index]);
+      add_character(AXIS_CHAR(index));
     else
       add_character(ch);
   }
diff --git a/Marlin/src/lcd/lcdprint.cpp b/Marlin/src/lcd/lcdprint.cpp
index 6921813069..deec2b1778 100644
--- a/Marlin/src/lcd/lcdprint.cpp
+++ b/Marlin/src/lcd/lcdprint.cpp
@@ -78,7 +78,7 @@ lcd_uint_t lcd_put_u8str_P(PGM_P const ptpl, const int8_t ind, const char *cstr/
       n -= lcd_put_u8str_max(cstr, n * (MENU_FONT_WIDTH)) / (MENU_FONT_WIDTH);
     }
     else if (ch == '@') {
-      lcd_put_wchar(axis_codes[ind]);
+      lcd_put_wchar(AXIS_CHAR(ind));
       n--;
     }
     else {
diff --git a/Marlin/src/lcd/marlinui.cpp b/Marlin/src/lcd/marlinui.cpp
index 0765ef40a9..8958de657c 100644
--- a/Marlin/src/lcd/marlinui.cpp
+++ b/Marlin/src/lcd/marlinui.cpp
@@ -840,7 +840,7 @@ void MarlinUI::init() {
             TERN_(MULTI_E_MANUAL, axis == E_AXIS ? e_index :) active_extruder
           );
 
-          //SERIAL_ECHOLNPGM("Add planner.move with Axis ", AS_CHAR(axis_codes[axis]), " at FR ", fr_mm_s);
+          //SERIAL_ECHOLNPGM("Add planner.move with Axis ", AS_CHAR(AXIS_CHAR(axis)), " at FR ", fr_mm_s);
 
           axis = NO_AXIS_ENUM;
 
@@ -857,7 +857,7 @@ void MarlinUI::init() {
       TERN_(MULTI_E_MANUAL, if (move_axis == E_AXIS) e_index = eindex);
       start_time = millis() + (menu_scale < 0.99f ? 0UL : 250UL); // delay for bigger moves
       axis = move_axis;
-      //SERIAL_ECHOLNPGM("Post Move with Axis ", AS_CHAR(axis_codes[axis]), " soon.");
+      //SERIAL_ECHOLNPGM("Post Move with Axis ", AS_CHAR(AXIS_CHAR(axis)), " soon.");
     }
 
     #if ENABLED(AUTO_BED_LEVELING_UBL)
diff --git a/Marlin/src/lcd/tft/tft_string.cpp b/Marlin/src/lcd/tft/tft_string.cpp
index 8585d1d82f..d8c419d1a0 100644
--- a/Marlin/src/lcd/tft/tft_string.cpp
+++ b/Marlin/src/lcd/tft/tft_string.cpp
@@ -116,7 +116,7 @@ void TFT_String::add(const char *tpl, const int8_t index, const char *cstr/*=nul
     else if (ch == '$' && cstr)
       add(cstr);
     else if (ch == '@')
-      add_character(axis_codes[index]);
+      add_character(AXIS_CHAR(index));
     else
       add_character(ch);
   }
diff --git a/Marlin/src/libs/L64XX/L64XX_Marlin.cpp b/Marlin/src/libs/L64XX/L64XX_Marlin.cpp
index 5752f647f0..1d69434067 100644
--- a/Marlin/src/libs/L64XX/L64XX_Marlin.cpp
+++ b/Marlin/src/libs/L64XX/L64XX_Marlin.cpp
@@ -412,11 +412,11 @@ uint8_t L64XX_Marlin::get_user_input(uint8_t &driver_count, L64XX_axis_t axis_in
   }
 
   uint8_t found_displacement = false;
-  LOOP_LOGICAL_AXES(i) if (uint16_t _displacement = parser.intval(axis_codes[i])) {
+  LOOP_LOGICAL_AXES(i) if (uint16_t _displacement = parser.intval(AXIS_CHAR(i))) {
     found_displacement = true;
     displacement = _displacement;
     const uint8_t axis_offset = parser.byteval('J');
-    axis_mon[0][0] = axis_codes[i];         // Axis first character, one of XYZ...E
+    axis_mon[0][0] = AXIS_CHAR(i);          // Axis first character, one of XYZ...E
     const bool single_or_e = axis_offset >= 2 || axis_mon[0][0] == 'E',
                one_or_more = !single_or_e && axis_offset == 0;
     uint8_t driver_count_local = 0;         // Can't use "driver_count" directly as a subscript because it's passed by reference
@@ -667,7 +667,7 @@ uint8_t L64XX_Marlin::get_user_input(uint8_t &driver_count, L64XX_axis_t axis_in
     static constexpr float default_max_feedrate[] = DEFAULT_MAX_FEEDRATE;
     const uint8_t num_feedrates = COUNT(default_max_feedrate);
     for (j = 0; j < num_feedrates; j++) {
-      if (axis_codes[j] == axis_mon[0][0]) {
+      if (AXIS_CHAR(j) == axis_mon[0][0]) {
         final_feedrate = default_max_feedrate[j];
         break;
       }