diff --git a/nicsensor_v2/nicsensor.sh b/nicsensor_v2/nicsensor.sh
index df45386..abbc2ac 100644
--- a/nicsensor_v2/nicsensor.sh
+++ b/nicsensor_v2/nicsensor.sh
@@ -121,7 +121,7 @@ conf_pre_check
 parse_slot_name
 
 i2c_bus=`connect_i2c`
-if [ $? -ne 0 ];then
+if [ $i2c_bus -lt 0 ];then
     $fmt_print "console" "Error" "An Error occured when build i2c connection with ${nic_type} ${slot_id}"
     exit 1
 fi
diff --git a/nicsensor_v2/platform_5280m7.sh b/nicsensor_v2/platform_5280m7.sh
index a933c59..ec66ce8 100644
--- a/nicsensor_v2/platform_5280m7.sh
+++ b/nicsensor_v2/platform_5280m7.sh
@@ -15,6 +15,13 @@ pca9548_channel=""
 
 is_have_pca9641=0
 
+# An func to echo a error code and then exit
+# @Param1 error code
+throw_error(){
+    echo $1
+    exit 1
+}
+
 record_i2c_status(){
     $fmt_print "log" "Info" "[platform_5280m7] Start record i2c configuration"
     $fmt_print "log" "Info" "Nic Type: $nic_type"
@@ -89,7 +96,7 @@ get_pca9641_control(){
 
     if [ "$res_build" != "0x87" ];then
         $fmt_print "console" "Error" "Cannot establish connection with pca9641 !!!"
-        exit 1
+        throw_error "-1"
     fi
 }
 
diff --git a/nicsensor_v2/platform_5688m7.sh b/nicsensor_v2/platform_5688m7.sh
index d3be9d9..4f97e52 100644
--- a/nicsensor_v2/platform_5688m7.sh
+++ b/nicsensor_v2/platform_5688m7.sh
@@ -15,6 +15,13 @@ pca9548_channel=""
 
 is_have_pca9641=0
 
+# An func to echo a error code and then exit
+# @Param1 error code
+throw_error(){
+    echo $1
+    exit 1
+}
+
 record_i2c_status(){
     $fmt_print "log" "Info" "[platform_5688m7] Start record i2c configuration"
     $fmt_print "log" "Info" "Nic Type: $nic_type"
@@ -83,7 +90,7 @@ get_pca9641_control(){
 
     if [ "$res_build" != "0x87" ];then
         $fmt_print "console" "Error" "Cannot establish connection with pca9641 !!!"
-        exit 1
+        throw_error "-1"
     fi
 }