diff --git a/rusEFI-Wideband-Controller.md b/rusEFI-Wideband-Controller.md
index 8b1ff906..b95efadb 100644
--- a/rusEFI-Wideband-Controller.md
+++ b/rusEFI-Wideband-Controller.md
@@ -4,5 +4,14 @@
 |:--------:|:---------:| -----|
 | off | slow flash | sensor warming up |
 | off | fast flash | Sensor hot, operating |
-| fast flash | off | sensor failed to reach temperature in 15 seconds |
+| flashing | off | See error code table below |
 | alternating | alternating | Bootloader |
+
+
+## Error Codes
+
+Green LED off and blue LED flashing indicates an error.  The blue LED will blink a certain number of times, with a 2 second pause, then repeats.
+
+| Blinks | Meaning |
+| --- |:--- |
+| 3 | Sensor failed to heat up within 15 seconds |