diff --git a/PCM-Connector-B.md b/PCM-Connector-B.md
index 7230a38..ad87535 100644
--- a/PCM-Connector-B.md
+++ b/PCM-Connector-B.md
@@ -8,7 +8,7 @@ See page 11-17
     <td><a href="#b2"><b>2</b></a></td>
     <td><a href="#b3"><b>3</b></a></td>
     <td>/</td>
-    <td>5</td>
+    <td><a href="#b5"><b>5</b></a></td>
     <td colspan="2"></td>
     <td>6</td>
     <td>7</td>
@@ -47,6 +47,10 @@ VTEC Solenoid Valve
 
 EGR Valve
 
+## B5
+
+Primary HO2S (O2 sensor)
+
 ## B8
 
 Cylinder 3 Coil Pack