diff --git a/board/oak/board.c b/board/oak/board.c
index 70cb91de7a..f8c2408a45 100644
--- a/board/oak/board.c
+++ b/board/oak/board.c
@@ -67,7 +67,8 @@ void vbus_wake_interrupt(enum gpio_signal signal)
 
 void pd_mcu_interrupt(enum gpio_signal signal)
 {
-	hook_call_deferred(tcpc_alert, 0);
+	/* Exchange status with PD MCU to determin interrupt cause */
+	host_command_pd_send_status(0);
 }
 
 #include "gpio_list.h"
diff --git a/board/oak_pd/board.c b/board/oak_pd/board.c
index a29d143054..8d346661b5 100644
--- a/board/oak_pd/board.c
+++ b/board/oak_pd/board.c
@@ -103,3 +103,19 @@ DECLARE_CONSOLE_COMMAND(ecint, command_ec_int,
 			"Toggle EC interrupt line",
 			NULL);
 
+static int ec_status_host_cmd(struct host_cmd_handler_args *args)
+{
+	struct ec_response_pd_status *r = args->response;
+
+	/*
+	 * TODO: use state here to notify EC of host events, tcpc port
+	 * 0 alert and tcpc port 1 alert.
+	 */
+	r->status = 0;
+	args->response_size = sizeof(*r);
+
+	return EC_RES_SUCCESS;
+}
+DECLARE_HOST_COMMAND(EC_CMD_PD_EXCHANGE_STATUS, ec_status_host_cmd,
+			EC_VER_MASK(1));
+