diff --git a/libraries/AP_Generator/AP_Generator_IE_2400.cpp b/libraries/AP_Generator/AP_Generator_IE_2400.cpp
index 8a4e01eade..bfb90a4c4a 100644
--- a/libraries/AP_Generator/AP_Generator_IE_2400.cpp
+++ b/libraries/AP_Generator/AP_Generator_IE_2400.cpp
@@ -395,7 +395,7 @@ bool AP_Generator_IE_2400::is_low_error(const uint32_t err_in) const
 bool AP_Generator_IE_2400::check_for_err_code(char* msg_txt, uint8_t msg_len) const
 {
     if ((_version == ProtocolVersion::V2) && (strlen(_valid_V2.info_str) > 0)) {
-        hal.util->snprintf(msg_txt, msg_len, "Fuel cell err %s", _valid_V2.info_str);
+        hal.util->snprintf(msg_txt, msg_len, "Fuel cell err %u.%u: %s", (unsigned)_err_code, (unsigned)_sub_err_code, _valid_V2.info_str);
         return true;
     }
 
diff --git a/libraries/AP_Generator/AP_Generator_IE_FuelCell.cpp b/libraries/AP_Generator/AP_Generator_IE_FuelCell.cpp
index e25a382368..da7991a23f 100644
--- a/libraries/AP_Generator/AP_Generator_IE_FuelCell.cpp
+++ b/libraries/AP_Generator/AP_Generator_IE_FuelCell.cpp
@@ -168,7 +168,7 @@ void AP_Generator_IE_FuelCell::check_status(const uint32_t now)
     update_state_msg();
 
     // Check error codes
-    char msg_txt[32];
+    char msg_txt[64];
     if (check_for_err_code_if_changed(msg_txt, sizeof(msg_txt))) {
         GCS_SEND_TEXT(MAV_SEVERITY_ALERT, "%s", msg_txt);
     }