2004 santa fe code p0455 will not clear.

Question

I have a Matco scanner and it will not clear code. I did try disconnecting the battery, still did not clear. Gas cap rerplaced and purge valve replaced. I think it may have a bad ecm. Any help will be appreciated.

Answer 1

The P0455 code means that there is a large EVAP system leak on the system, it's possible that you still have a large leak after you replaced those parts. Check for loose or damaged hoses. The code won't clear until you fix the problem.