Cardiff boss Ole Gunnar Solskjaer insists his side must tighten up at the back if they are to halt a run which has seen them slip to second bottom of the Premier League table.
Solskjaer has seen City ship 13 goals since taking over from Malky Mackay on January 2, a run which has yielded just one victory from five league games.
Saturday's 3-0 defeat at Swansea left them three points from safety but with three of their next four games at home Solskjaer is looking for an upturn in fortunes, starting with Aston Villa on Tuesday.
"Any goal you concede you can point to something that has gone wrong," said the Norwegian, whose side entertain Hull on February 22 and Fulham on March 8, six days after travelling to London to face Tottenham.
"We do concede too many goals at the moment to have any chance of winning games. We can't let in two goals and just expect to score three.
"We have also conceded too many goals at home although Saturday's game was the first time we have gone in level at half time under me.
"The second half was disappointing so this is something that we have to address. We simply have to stop letting in the amount of goals we are at the moment."