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Old 04-11-2010, 03:13 PM   #1
DVad3r
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Question Check engine light after cleaning throttle body?

Hey guys,

I did a tune up on my car. I changed the spark plugs, replaced the air filter, cleaned the MAF sensor, and cleaned the throttle body.

Everything went fine until towards the end of the throttle body cleaning when the check engine light came on. The weird thing about cleaning the throttle body was that the engine would shut off when you unplugged the rubber intake tubes to get to it. We sprayed the cleaner in, reconnected the tube, turned the engine on, reved it a bit, then shut it off and repeat. The engine shut off a few times though when lifting the tubes. Also, we managed to lift the tube just a little while the engine ran to get the nozzle in and spray the cleaner. The engine would idle roughly and then idle strong, my dad said that's normal as it was burning the cleaner.

Anyways, close to the end of using 2/3rd of the bottle, the check engine light came on. We finished cleaning, reconnected everything the way it was, and the light was still on.

We disconnected the battery and reset the computer, and the light went away. Hopefully it doesn't come back.

My question is, is there anything that we could of messed up while cleaning the throttle bodies? If the engine chugged and shut off would that be the reason the light came on and stayed on even after everything was reconnected?

I just want to make sure we didn't F anything up...

Thanks,

Car is a 2001 Lexus ES 300
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Old 04-11-2010, 03:42 PM   #2
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It was just leaning out through a vacuum leak you were creating. Should be fine.
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Old 04-11-2010, 04:07 PM   #3
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^ yep
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Old 04-11-2010, 04:33 PM   #4
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The CEL is probably just a lean condition indicator. It should clear itself after you put some time on the engine.

Edit: if you're worried, go to advance or autozone and have them pull the code. If it's anything relating to a lean mixture, you can safely ignore it until it clears itself.
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Old 04-11-2010, 04:48 PM   #5
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Thanks guys, that's probably it. I cleared the light by resetting the battery/computer, hopefully it doesn't come back.
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