Hello,

I just finished washing down my engine bay, and after letting it dry off for a while, I got a code 33 after starting it up. Checked my IAC(more on that later), and my TPS voltage which was fine. Car seems to run alright, maybe a little rougher but not enough that you could notice much of a difference if you didn't know.

Before I go searching for a new MAF sensor, what relays/wiring could I check to see that might be fried, and how would I go about checking them? Also, would it be possible I knocked a vacuum line loose perhaps? Any sort of procedure with diagrams would be excellent. I let my car sit overnight and dry, disconnected battery in the morning and let codes reset, but still get code 33.

About the IAC: No matter how far in or out I set the IAC Torx bolt, when I try to adjust the idle, the car will stall immediately when I start it with the IAC unplugged. Is this a bad IAC motor possibly? It has always been like this, not just since I washed the engine. My car has always idled about 1000 in Park when I start it up, after getting warm it gets down to 600 or so in drive. Seems to search for an idle a little bit too when it starts cold.

Thanks again,
-Dustin

 

Okay, so I don't have to go look it up and I don't remember, what is code 33, low voltage, high voltage, no voltage, DOA, what?