diff --git a/artiq/coredevice/comm_moninj.py b/artiq/coredevice/comm_moninj.py
index 25fd11ba0..9397c97e5 100644
--- a/artiq/coredevice/comm_moninj.py
+++ b/artiq/coredevice/comm_moninj.py
@@ -51,16 +51,20 @@ class CommMonInj:
             del self._reader
             del self._writer
 
-    def monitor(self, enable, channel, probe):
+    def monitor_probe(self, enable, channel, probe):
         packet = struct.pack(">bblb", 0, enable, channel, probe)
         self._writer.write(packet)
 
+    def monitor_injection(self, enable, channel, overrd):
+        packet = struct.pack(">bblb", 1, enable, channel, overrd)
+        self._writer.write(packet)
+
     def inject(self, channel, override, value):
-        packet = struct.pack(">blbb", 1, channel, override, value)
+        packet = struct.pack(">blbb", 2, channel, override, value)
         self._writer.write(packet)
 
     def get_injection_status(self, channel, override):
-        packet = struct.pack(">blb", 2, channel, override)
+        packet = struct.pack(">blb", 3, channel, override)
         self._writer.write(packet)
 
     async def _receive_cr(self):
diff --git a/artiq/dashboard/moninj.py b/artiq/dashboard/moninj.py
index d36807da3..bbd0b9a3e 100644
--- a/artiq/dashboard/moninj.py
+++ b/artiq/dashboard/moninj.py
@@ -339,18 +339,20 @@ class _DeviceManager:
 
     def setup_ttl_monitoring(self, enable, channel):
         if self.core_connection is not None:
-            self.core_connection.monitor(enable, channel, TTLProbe.level.value)
-            self.core_connection.monitor(enable, channel, TTLProbe.oe.value)
+            self.core_connection.monitor_probe(enable, channel, TTLProbe.level.value)
+            self.core_connection.monitor_probe(enable, channel, TTLProbe.oe.value)
+            self.core_connection.monitor_injection(enable, channel, TTLOverride.en.value)
+            self.core_connection.monitor_injection(enable, channel, TTLOverride.level.value)
             if enable:
                 self.core_connection.get_injection_status(channel, TTLOverride.en.value)
 
     def setup_dds_monitoring(self, enable, bus_channel, channel):
         if self.core_connection is not None:
-            self.core_connection.monitor(enable, bus_channel, channel)
+            self.core_connection.monitor_probe(enable, bus_channel, channel)
 
     def setup_dac_monitoring(self, enable, spi_channel, channel):
         if self.core_connection is not None:
-            self.core_connection.monitor(enable, spi_channel, channel)
+            self.core_connection.monitor_probe(enable, spi_channel, channel)
 
     def monitor_cb(self, channel, probe, value):
         if channel in self.ttl_widgets:
@@ -371,7 +373,12 @@ class _DeviceManager:
 
     def injection_status_cb(self, channel, override, value):
         if channel in self.ttl_widgets:
-            self.ttl_widgets[channel].cur_override = bool(value)
+            widget = self.ttl_widgets[channel]
+            if override == TTLOverride.en.value:
+                widget.cur_override = bool(value)
+            if override == TTLOverride.level.value:
+                widget.cur_level = bool(value)
+            widget.refresh_display()
 
     async def core_connector(self):
         while True:
diff --git a/artiq/firmware/libproto_artiq/moninj_proto.rs b/artiq/firmware/libproto_artiq/moninj_proto.rs
index d6f9a699b..283ecb0f3 100644
--- a/artiq/firmware/libproto_artiq/moninj_proto.rs
+++ b/artiq/firmware/libproto_artiq/moninj_proto.rs
@@ -32,7 +32,8 @@ pub fn read_magic<R>(reader: &mut R) -> Result<(), Error<R::ReadError>>
 
 #[derive(Debug)]
 pub enum HostMessage {
-    Monitor { enable: bool, channel: u32, probe: u8 },
+    MonitorProbe { enable: bool, channel: u32, probe: u8 },
+    MonitorInjection { enable: bool, channel: u32, overrd: u8 },
     Inject { channel: u32, overrd: u8, value: u8 },
     GetInjectionStatus { channel: u32, overrd: u8 }
 }
@@ -48,17 +49,22 @@ impl HostMessage {
         where R: Read + ?Sized
     {
         Ok(match reader.read_u8()? {
-            0 => HostMessage::Monitor {
+            0 => HostMessage::MonitorProbe {
                 enable: if reader.read_u8()? == 0 { false } else { true },
                 channel: reader.read_u32()?,
                 probe: reader.read_u8()?
             },
-            1 => HostMessage::Inject {
+            1 => HostMessage::MonitorInjection {
+                enable: if reader.read_u8()? == 0 { false } else { true },
+                channel: reader.read_u32()?,
+                overrd: reader.read_u8()?
+            },
+            2 => HostMessage::Inject {
                 channel: reader.read_u32()?,
                 overrd: reader.read_u8()?,
                 value: reader.read_u8()?
             },
-            2 => HostMessage::GetInjectionStatus {
+            3 => HostMessage::GetInjectionStatus {
                 channel: reader.read_u32()?,
                 overrd: reader.read_u8()?
             },
diff --git a/artiq/firmware/runtime/moninj.rs b/artiq/firmware/runtime/moninj.rs
index d589d63d2..665927e39 100644
--- a/artiq/firmware/runtime/moninj.rs
+++ b/artiq/firmware/runtime/moninj.rs
@@ -146,7 +146,8 @@ fn read_injection_status(channel: u32, probe: u8) -> u8 {
 }
 
 fn connection_worker(io: &Io, mut stream: &mut TcpStream) -> Result<(), Error<SchedError>> {
-    let mut watch_list = BTreeMap::new();
+    let mut probe_watch_list = BTreeMap::new();
+    let mut inject_watch_list = BTreeMap::new();
     let mut next_check = 0;
 
     read_magic(&mut stream)?;
@@ -158,11 +159,18 @@ fn connection_worker(io: &Io, mut stream: &mut TcpStream) -> Result<(), Error<Sc
             trace!("moninj<-host {:?}", request);
 
             match request {
-                HostMessage::Monitor { enable, channel, probe } => {
+                HostMessage::MonitorProbe { enable, channel, probe } => {
                     if enable {
-                        let _ = watch_list.entry((channel, probe)).or_insert(None);
+                        let _ = probe_watch_list.entry((channel, probe)).or_insert(None);
                     } else {
-                        let _ = watch_list.remove(&(channel, probe));
+                        let _ = probe_watch_list.remove(&(channel, probe));
+                    }
+                },
+                HostMessage::MonitorInjection { enable, channel, overrd } => {
+                    if enable {
+                        let _ = inject_watch_list.entry((channel, overrd)).or_insert(None);
+                    } else {
+                        let _ = inject_watch_list.remove(&(channel, overrd));
                     }
                 },
                 HostMessage::Inject { channel, overrd, value } => inject(channel, overrd, value),
@@ -183,7 +191,7 @@ fn connection_worker(io: &Io, mut stream: &mut TcpStream) -> Result<(), Error<Sc
         }
 
         if clock::get_ms() > next_check {
-            for (&(channel, probe), previous) in watch_list.iter_mut() {
+            for (&(channel, probe), previous) in probe_watch_list.iter_mut() {
                 let current = read_probe(channel, probe);
                 if previous.is_none() || previous.unwrap() != current {
                     let message = DeviceMessage::MonitorStatus {
@@ -198,6 +206,21 @@ fn connection_worker(io: &Io, mut stream: &mut TcpStream) -> Result<(), Error<Sc
                     *previous = Some(current);
                 }
             }
+            for (&(channel, overrd), previous) in inject_watch_list.iter_mut() {
+                let current = read_injection_status(channel, overrd);
+                if previous.is_none() || previous.unwrap() != current {
+                    let message = DeviceMessage::InjectionStatus {
+                        channel: channel,
+                        overrd: overrd,
+                        value: current
+                    };
+
+                    trace!("moninj->host {:?}", message);
+                    message.write_to(stream)?;
+
+                    *previous = Some(current);
+                }
+            }
             next_check = clock::get_ms() + 200;
         }