Car was running great, drove through a water puddle and the SES light came on. Pulled code and it's a code 42, car was idling rough and had a random no start condition. Installed a new opti - it was due at 154k - new icm at the same time, checked all wiring and connectors all look good. Any ideas? I need the car asap as it is my daily driver. Thanks in advance.

 

ignition control shorted or grounded