US Federal Reserve Chair Jerome Powell
US Federal Reserve Chair Jerome Powell attends a press conference in Washington, DC, on March 22, 2023.
  • Recession odds are below 50%, but a Fed policy mistake could worsen them, Mohamed El-Erian told CNBC.
  • If they keep rates longer than necessary, such as cutting after June, the chances of a recession rise.
  • Tuesday's CPI data was a wake-up call for investors who have gotten carried away, he said.

Though economic strength has kept a US recession at bay, a downturn could still happen if the Federal Reserve's constrictive monetary policy stretches on for longer than necessary, economist Mohamed El-Erian told CNBC.