Code 2257
#1
Code 2257
Hi All- I'm troubleshooting this code, and rapidly reaching wit's end. I've replaced the pump itself, the bank A check valve and the switchover to no avail. I think I have replaced the relay for the pump, but there are multiple opinions as to which is the correct part. Am I missing somethink obvious? I recently found reference to an air injection valve, but dont't know what this is or where to find it. Any suggestions appreciated.
#4
Senior Member
#5
MBWorld Fanatic!
Are you using a generic code scanner?
Do you have a check engine light that corresponds to secondary air injection?
Do you hear the pump operating at cold starts?
MB star with developer mode gives you the ability to just code that stuff out as it does really nothing for you anyway.
Do you have a check engine light that corresponds to secondary air injection?
Do you hear the pump operating at cold starts?
MB star with developer mode gives you the ability to just code that stuff out as it does really nothing for you anyway.