diff --git a/tools/cabana/binaryview.cc b/tools/cabana/binaryview.cc
index 5d191d2ca3..26fecd8c38 100644
--- a/tools/cabana/binaryview.cc
+++ b/tools/cabana/binaryview.cc
@@ -132,6 +132,20 @@ const Signal *BinaryView::getResizingSignal() const {
   return nullptr;
 }
 
+QSet<const Signal *> BinaryView::getOverlappingSignals() const {
+  QSet<const Signal *> overlapping;
+  for (int i = 0; i < model->rowCount(); ++i) {
+    for (int j = 0; j < model->columnCount() - 1; ++j) {
+      auto item = (const BinaryViewModel::Item *)model->index(i, j).internalPointer();
+      if (item && item->sigs.size() > 1) {
+        for (auto s : item->sigs)
+          overlapping.insert(s);
+      }
+    }
+  }
+  return overlapping;
+}
+
 // BinaryViewModel
 
 void BinaryViewModel::setMessage(const QString &message_id) {
diff --git a/tools/cabana/binaryview.h b/tools/cabana/binaryview.h
index e57033b797..0f58e9ed20 100644
--- a/tools/cabana/binaryview.h
+++ b/tools/cabana/binaryview.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <QList>
+#include <QSet>
 #include <QStyledItemDelegate>
 #include <QTableView>
 
@@ -59,6 +60,7 @@ public:
   void updateState();
   void highlight(const Signal *sig);
   const Signal *hoveredSignal() const { return hovered_sig; }
+  QSet<const Signal*> getOverlappingSignals() const;
 
 signals:
   void signalHovered(const Signal *sig);
diff --git a/tools/cabana/detailwidget.cc b/tools/cabana/detailwidget.cc
index 443b33b521..7290e4e6ff 100644
--- a/tools/cabana/detailwidget.cc
+++ b/tools/cabana/detailwidget.cc
@@ -49,7 +49,7 @@ DetailWidget::DetailWidget(QWidget *parent) : QWidget(parent) {
   QHBoxLayout *warning_hlayout = new QHBoxLayout(warning_widget);
   QLabel *warning_icon = new QLabel(this);
   warning_icon->setPixmap(style()->standardPixmap(QStyle::SP_MessageBoxWarning));
-  warning_hlayout->addWidget(warning_icon);
+  warning_hlayout->addWidget(warning_icon, 0, Qt::AlignTop);
   warning_label = new QLabel(this);
   warning_hlayout->addWidget(warning_label, 1, Qt::AlignLeft);
   warning_widget->hide();
@@ -107,6 +107,8 @@ void DetailWidget::dbcMsgChanged(int show_form_idx) {
   if (msg_id.isEmpty()) return;
 
   warning_widget->hide();
+  QStringList warnings;
+
   clearLayout(signals_container->layout());
   QString msg_name = tr("untitled");
   if (auto msg = dbc()->msg(msg_id)) {
@@ -124,16 +126,25 @@ void DetailWidget::dbcMsgChanged(int show_form_idx) {
       }
     }
     msg_name = msg->name.c_str();
-    if (msg->size != can->lastMessage(msg_id).dat.size()) {
-      warning_label->setText(tr("Message size (%1) is incorrect!").arg(msg->size));
-      warning_widget->show();
-    }
+    if (msg->size != can->lastMessage(msg_id).dat.size())
+      warnings.push_back(tr("Message size (%1) is incorrect.").arg(msg->size));
   }
   edit_btn->setVisible(true);
   name_label->setText(msg_name);
 
   binary_view->setMessage(msg_id);
   history_log->setMessage(msg_id);
+
+  // Check overlapping bits
+  if (auto overlapping = binary_view->getOverlappingSignals(); !overlapping.isEmpty()) {
+    for (auto s : overlapping)
+      warnings.push_back(tr("%1 has overlapping bits.").arg(s->name.c_str()));
+  }
+
+  if (!warnings.isEmpty()) {
+    warning_label->setText(warnings.join('\n'));
+    warning_widget->show();
+  }
 }
 
 void DetailWidget::updateState() {