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-rw-r--r--libraries/OBD/OBD.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/libraries/OBD/OBD.h b/libraries/OBD/OBD.h
index c42b450..ba10631 100644
--- a/libraries/OBD/OBD.h
+++ b/libraries/OBD/OBD.h
@@ -55,6 +55,7 @@
#define PID_CATALYST_TEMP_B2S2 0x3F
#define PID_CONTROL_MODULE_VOLTAGE 0x42
#define PID_ABSOLUTE_ENGINE_LOAD 0x43
+#define PID_AIR_FUEL_EQUIV_RATIO 0x44
#define PID_RELATIVE_THROTTLE_POS 0x45
#define PID_AMBIENT_TEMP 0x46
#define PID_ABSOLUTE_THROTTLE_POS_B 0x47