How to perform sub-discharge with auto-fill

Question

Code that performed the consultation:

$parametro = (isset($_GET['parametro'])) ? $_GET['parametro'] : '';

if($acao == 'consulta'):
$sql = "SELECT codigo,preco FROM produtos ";
$sql .= "WHERE descricao LIKE ? LIMIT 1";

try{
    $query_select = $conecta->prepare($sql);        
    $query_select->bindValue(1, '%'.$parametro);
    $query_select->execute();
    $dados = $query_select->fetchAll(PDO::FETCH_OBJ);
}catch (PDOexception $error_select){
    echo 'Erro ao selecionar: '.$error_select->getMessage();
}

$json = json_encode($dados);
echo $json;
endif;

Load query data in the "Code" and "Price" fields":

function carregarDados(){
    var busca = $('#busca').val();
    if(busca != "" && busca.length >= 2){
        $.ajax({
            url: "consulta.php",
            dataType: "json",   
            data: {
                acao: 'consulta',
                parametro: $('#busca').val()
            },
            success: function( data ) {
               $('#codigo').val(data[0].codigo);
               $('#preco').val(data[0].preco);
            }
        });
    }
}

and function to trigger autocomplete

$( "#busca" ).autocomplete({
    minLength: 2,
    source: function( request, response ) {
        $.ajax({
            url: "consulta.php",
            dataType: "json",
            data: {
                acao: 'autocomplete',
                parametro: $('#busca').val()
            },
            success: function(data) {
               response(data);
            }
        });
    },
    focus: function( event, ui ) {
        $("#busca").val( ui.item.descricao );
        carregarDados();
        return false;
    },
    select: function( event, ui ) {
        $("#busca").val( ui.item.descricao );
        return false;
    }
})

.autocomplete( "instance" )._renderItem = function(ul, item) {
    return $( "<li>" ).append( "<strong>Código: </strong>" + item.codigo
    + "&nbsp; | &nbsp; <strong>Descrição: </strong>" + item.descricao
    + "<br>" ).appendTo(ul);
};

The query is performed based on the description of the search field and the return is displayed in the fields "Code" and "Price", however when there are two products with the same description and different codes the fields mentioned are not updated.

Illustration:

Code, explanation and execution found in links:

https://www.youtube.com/watch?v=PPROnjv1fhI

http://www.devwilliam.com.br/php/autocomplete-com-jquery-ui-php-mysql