'02 Boxster S Does Not Pass Emissions

[jmatta]

My good friend's S did not pass emissions testing yesterday. This car ran perfectly well when placed into storage last fall. A can of "seafoam" was added to the fuel tank and a battery tender placed to take care of the charge. He took the car out and drove it for a hour or so, then headed to the testing station.

The car did not pass because the errors were two fold: 1. Secondary air system - not ready 2. Catalytic warmup - not ready.

I plugged my code reader into his ECU and did not detect any fault codes. It appears the ECU simply isn't reading these sensors. My suggestion to him was to disconnect the battery for a minimum of five minutes, then take the car for another longer drive to "re-map" the ECU.

Is this a reasonable assumption? Any expert advice would be appreciated.