Hey all,

I am trying to resolve the intermittent air flow reading on bank one. Have changed the combi valve, checked the vacuum lines, cleaned out the port and tested the secondary air pump. On cold start I can here the air pump come on for about 5-8 seconds. When I go through this process the CEL light stays off. If I don't wait for the air pump to kick-in and just start-up and go the CEL comes on and gives me that same intermittent air flow code on bank 1. So is the air pump not working properly? Or could it be something else?

Thanks in advance all!