P0407 - Satern 1.9 can the egr valve be cleaned or must it be replaced

Question

check engine light goes out then comes back on after driving for 10 minuites the code reader is showing 2 po407 codes

Answer 1

P0407 Exhaust gas recirculation sensor B circuit low

You may not even need to replace the EGR check the connection this can just be a failed connection or a intermittent connection, If the connection are good you would need to replace the EGR, cleaning will not fix this code condition. This is more of a connection problem either internally or externally