diff --git a/static/item_updater_helper.cpp b/static/item_updater_helper.cpp
index 19ac61d..572cb9c 100644
--- a/static/item_updater_helper.cpp
+++ b/static/item_updater_helper.cpp
@@ -9,8 +9,11 @@
 {
 // openbmconce=clean-rwfs-filesystem factory-reset
 #define ENV_FACTORY_RESET "openbmconce\\x3dfactory\\x2dreset"
+#define ENV_ENABLE_FIELD_MODE "fieldmode\\x3dtrue"
 #define SERVICE_FACTORY_RESET                                                  \
     "obmc-flash-bmc-setenv@" ENV_FACTORY_RESET ".service"
+#define SERVICE_ENABLE_FIELD_MODE                                              \
+    "obmc-flash-bmc-setenv@" ENV_ENABLE_FIELD_MODE ".service"
 
 void Helper::setEntry(const std::string& entryId, uint8_t value)
 {
@@ -49,7 +52,10 @@
 
 void Helper::enableFieldMode()
 {
-    // TODO
+    auto method = bus.new_method_call(SYSTEMD_BUSNAME, SYSTEMD_PATH,
+                                      SYSTEMD_INTERFACE, "StartUnit");
+    method.append(SERVICE_ENABLE_FIELD_MODE, "replace");
+    bus.call_noreply(method);
 }
 
 void Helper::mirrorAlt()