CEL codes

[Jager]

Originally Posted by Jamesp

P0491 and P0492, secondary air system bank 1, secondary air system bank 2 :troll:

The electric air pump runs with a durametric

The car runs great

2003 S 6 speed

The engine was recently rebuilt from the crank out and the passages to the exhaust manifold were completely cleaned

Any idea how to troubleshoot the system or which part or condition might be the likely culprit?

You say the pump runs with a durametric but does it come on every time you start the motor when it is cold? It should run for ~90 seconds after a cold start.