every time it gets humid out for a couple days (65-75% humidity) my check engine light comes one usualy on the last day of t he humid air and then stays on for a day or two. after driving like 100-200 miles it goes off again. this has happened like 3 or 4 times this summer. anyone know what code this might throw? every time i try to get up to aut-ho-zone it goes off and they wont do a readout if the light isnt on. got any ideas?

 

anyone ever had this happen?

 

my bet is o2 sensor. and your ecu stores codes as long as it isn't cleared.

 

it hasnt been cleard since the last time it happened but autozone wont hook it up to the machine becuase the light isnt currently on which sucks. i think i might just replace that 02 sensor anyway because it has 140k on it plus the denso ones are cheap and oem.

 

You can get the codes out yourself.

http://www.c-speedracing.com/faq/06.php

That page explains it all. Even tells you what the codes mean through the link at the bottom. Tell us what you got.

 

sweet, i knew about that but forgot how to do it. thanks alot. gonna do it when i get home. one question tho, will it make my check engine light stay on after i jump that plug?

 

I had problems last year with my AEM cold air intake and really humid air or complete downpours. My car would just BOG while driving and almost felt llike it was going to stall on the highway.

I think what was happening in the intake tract was the humidty would accumilate on the bends and then send HUGE droplets into the manifold causing problems. Engine cannot burn water

 

you know what i think you are right, i never thought of that. it never happens at first, maybe the condensation needs to build up and then when the engine cools at night larger water droplets form and get into the map sensor or somthing like that causeing a CEL code. hmm. next time im gonna rip my intake tube off and check the bends for buildup. thanks man.

 

Do you mean will the light be cleared away after you've gotten the code off? If so, then no, it will stay on as long as the error is active. Resetting the light and error codes usually involves disconnecting the battery for about 30 seconds and it should clear.

If it is water getting into your engine, get the problem fixed ASAP before permanent damage takes place.

 

You are not going to see build up. As soon as you turn off your car the moisture should come out of the intake or evaporate.

Think of it like your hand out the window on a rainy day. It's going to collect water then form larger droplets and then fall off your hand.