Originally Posted by
tighed1
The PO410 is most likely burnt relay contacts on the air pump relay location in the relay control module (RCM).
I can refurbish your RCM by replacing the relays and redoing the bad solder joints (another RCM issue).
Email tighed1@hotmail.com for the details.
My understanding is to check the fuse first.
If the fuse is good, it's most likely that the RCM needs a refurb.
The last possibility is that the pump itself stopped working.
Let me check the fuses first, then I'll go from there.