what is solution for code Po455 and P0496.

Question

what is most common cause.

Answer 1

P0455 Evaporative system large leak detected

P0496 Evaporative emission system Purge flow detected during non purge flow

The common cause for this code is the FTP (fuel tank pressure ) sensor what happens is the FTP reports the wrong pressure / vacuum in the fuel tank and you can set these code condition