2010 Cx 7 malfunctions after a rain or car wash

TERRYA

Member
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Mazda CX 7 2010
After a rain or car wash, after starting the car, the RPM stays around 2000 RPM, the check engine light is on and the TCS/DSC Indicator Light is on. The RPM does not settle down to 1000 or below, and if put in gear it jumps violently, I suppose due to the high RPM. After a couple of hours of sitting dry and turned off, it starts normally. I cannot see where any water is getting into the engine area. Once it was running normally, I started the car and sprayed water all over the car but it never acted up. However, when I went back out an hour later, it malfunctioned again as described above. I called the dealer and they had never heard of such a thing. I know it needs to go to the shop but thought someone might have an idea. I will post the fix once diagnosed to this forum.
 
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