after cleaning engine, check engine light came on and won't go off on 1999 Saab 9-3

i was washing the engine off and let it run for 20 minutes after i washed it. When i restarted the car the check engine light came on and it won't go off. HELP

Asked by for the 1999 Saab 9-3
Sounds like an engine misfire was recognized, possibly due to water intrusion into an ignition wire or the distributor area. You will need to have the code checked and pulled. Pull each plug wire to verify there is not water residing inside.