diff --git a/esphome/components/uart/uart_component_esp_idf.cpp b/esphome/components/uart/uart_component_esp_idf.cpp
index deab790618..ea7a09fee6 100644
--- a/esphome/components/uart/uart_component_esp_idf.cpp
+++ b/esphome/components/uart/uart_component_esp_idf.cpp
@@ -19,6 +19,13 @@ namespace esphome::uart {
 
 static const char *const TAG = "uart.idf";
 
+/// Check if a pin number matches one of the default UART0 GPIO pins.
+/// These pins may have residual state from the boot console that requires
+/// explicit reset before UART reconfiguration (ESP-IDF issue #17459).
+static constexpr bool is_default_uart0_pin(int8_t pin_num) {
+  return pin_num == U0TXD_GPIO_NUM || pin_num == U0RXD_GPIO_NUM;
+}
+
 uart_config_t IDFUARTComponent::get_config_() {
   uart_parity_t parity = UART_PARITY_DISABLE;
   if (this->parity_ == UART_CONFIG_PARITY_EVEN) {
@@ -149,11 +156,7 @@ void IDFUARTComponent::load_settings(bool dump_config) {
   // Workaround for ESP-IDF issue: https://github.com/espressif/esp-idf/issues/17459
   // Commit 9ed617fb17 removed gpio_func_sel() calls from uart_set_pin(), which breaks
   // UART on default UART0 pins that may have residual state from boot console.
-  auto is_default_uart0_pin = [](int8_t pin_num) -> bool {
-    return pin_num == U0TXD_GPIO_NUM || pin_num == U0RXD_GPIO_NUM;
-  };
-
-  // Reset UART0 default pins before configuring UART to ensure they're in a clean state.
+  // Reset these pins before configuring UART to ensure they're in a clean state.
   if (is_default_uart0_pin(tx)) {
     gpio_reset_pin(static_cast<gpio_num_t>(tx));
   }
@@ -168,7 +171,7 @@ void IDFUARTComponent::load_settings(bool dump_config) {
   // IOMUX-connected pins, so the RX pin cannot receive data (see issue #10132).
   // For other pins, only call setup() if pull or open-drain flags are set to avoid
   // disturbing the default pin state which breaks some external components (#11823).
-  auto setup_pin_if_needed = [&is_default_uart0_pin](InternalGPIOPin *pin) {
+  auto setup_pin_if_needed = [](InternalGPIOPin *pin) {
     if (!pin) {
       return;
     }