I've Toyota Aqua 2012. Yesterday, I got my car washed from the service station with diesel spray in engine room. Just after having it washed, the car started having issues. Initially it didn't start at all. After trying 2 to 3 times, it finally started but AC was not working and 4 symbols were appearing on the dashboard screen. Engine check light (fuel pump symbol), hand brakes light, traction control and Hybrid warning light. Was so upset with this. Talked to my mechanic and he told me 'Don't Worry'. Just park the car in sun with opened bonnet for approx 2 hours. I did the same thing. After 2 hours, 2 out of 4 symbols had gone and AC started working but Hybrid warning light was still appearing Finally I got an idea...I took a hair dryer and tried to put some hot air around the plugs on hybrid synergy system in the bonnet. After doing it just for 5 mins, all the symbols had gone. So guys, if this happens to your cars, don't go to the mechanics immediately. They will charge heavy amount for removing the fault...............
Regards,
Fakhar Imam (Pakistan)