diff --git a/firmware/controllers/lua/examples/man-in-the-middle-nissan-tcu.txt b/firmware/controllers/lua/examples/man-in-the-middle-nissan-tcu.txt
index 5ca280a7b0..45d7672390 100644
--- a/firmware/controllers/lua/examples/man-in-the-middle-nissan-tcu.txt
+++ b/firmware/controllers/lua/examples/man-in-the-middle-nissan-tcu.txt
@@ -76,7 +76,12 @@ function onAnythingFromECU(bus, id, dlc, data)
 	and id ~= 734
 	then
   	print('from ECU ' ..id .." " ..arrayToString(data) .." dropped=" ..totalDropped .." replaced " ..totalReplaced)
-	end	txCan(TCU_BUS, id, 0, data) -- relay non-TCU message to TCU
+	end
+	if id < 2048 then
+  	txCan(TCU_BUS, id, 0, data) -- relay non-TCU message to TCU
+  else
+    print ("Not relaying EXT" .. id)
+  end
 end
 
 function relayFromECU(bus, id, dlc, data)
@@ -131,6 +136,20 @@ function onENGINE_3_573(bus, id, dlc, data)
 --	txCan(TCU_BUS, ENGINE_3_573, 0, data)
 end
 
+ENGINE_4_574 = 574
+payloadENGINE_4_574 = {0x00, 0x40, 0xff, 0x45, 0x00, 0xd6, 0x00, 0xa2}
+function onENGINE_4_574(bus, id, dlc, data)
+--	payloadENGINE_4_574[0] = data[0]
+--	payloadENGINE_4_574[1] = data[1]
+	payloadENGINE_4_574[2] = data[2]
+	payloadENGINE_4_574[3] = data[3]
+	payloadENGINE_4_574[4] = data[4]
+--	payloadENGINE_4_574[5] = data[5]
+	payloadENGINE_4_574[6] = data[6]
+	payloadENGINE_4_574[7] = data[7] -- affects desired torque converter pressure
+--	txCan(TCU_BUS, ENGINE_4_574, 0, data)
+	txCan(TCU_BUS, ENGINE_4_574, 0, payloadENGINE_4_574)
+end
 
 payloadENGINE_5 = {0x7d, 0xdb, 0x00, 0xa0, 0x00, 0x02, 0x80, 0xff}
 function onENGINE_5(bus, id, dlc, data)
@@ -147,10 +166,11 @@ canRxAdd(ECU_BUS, ENGINE_1_505, onENGINE_1_505)
 canRxAdd(ECU_BUS, ENGINE_2_561, onENGINE_2_561)
 canRxAdd(ECU_BUS, ENGINE_7_563, onENGINE_7_563)
 canRxAdd(ECU_BUS, ENGINE_3_573, onENGINE_3_573)
-canRxAdd(ECU_BUS, ENGINE_4_574, relayFromECU)
+canRxAdd(ECU_BUS, ENGINE_4_574, onENGINE_4_574)
 canRxAdd(ECU_BUS, ENGINE_5_1361, onENGINE_5)
 canRxAdd(ECU_BUS, ENGINE_6_1408, onENGINE_6)
 
+
 --canRxAdd(ECU_BUS, ENGINE_4_574, silentDrop)
 --canRxAdd(ECU_BUS, ENGINE_5_1361, relayFromECU)
 --canRxAdd(ECU_BUS, ENGINE_6_1408, relayFromECU)