Question about 1998 Toyota Sienna

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Air conditioning bad smell

The air conditioning system puts out a very bad smell when on. A friend said there is a evaporation tray for the air conditioning system under the vehicle. Further, he said, "If the drain tube for it gets clogged, then mold and all sorts of funkyness can ensue creating foul air". Where is the evaporation tray and drain tube, and could this be the problem?

Thank you, Richard

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Richard you have to check if your car uses to filter the air-conditioning closed the lid of the engine and where the breeze is a clean-clean grill before you turn off your air off the compressor and that was only working to remove the blower evaporator at all moisture-check that you have good drainage evaporator vote you all that water. Thanks and good luck

Posted on Aug 02, 2009

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Posted on Jan 02, 2017

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What makes my Chevy malibu 2005 v6 put system code po449 out


P0449 - OBD II Trouble Code Evaporative System Vent Valve/Solenoid Circuit Malfunction Our emissions expert has put together the following information about the P0449 fault code. We have also included diagnostic procedures you can take to your repair shop if the mechanic is having difficulty analyzing the code.
OBD II Fault Code
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Fault Code Definition
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What does this mean? The evaporative control (EVAP) system captures any raw fuel evaporating from the fuel storage system (e.g. the fuel tank, filler neck, and fuel cap). Under precise operating conditions-dictated by engine temperature, speed, and load-the EVAP system stores and purges these captured fuel vapors back into the combustion process. The carbon canister, which stores the raw fuel vapors, utilizes a vent valve that allows fresh air to enter the EVAP system. This displaces the fuel vapor as it's purged into the combustion process. Code P0449 indicates that the evaporative control (EVAP) system vent valve solenoid is malfunctioning. This can be caused by either too little or too much electrical resistance or a mechanical problem with the vent valve itself. Symptoms
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Common Problems That Trigger the P0449 Code
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  • Defective or damaged fuel cap
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Common Misdiagnoses
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Polluting Gases Expelled
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P0449 OBD II Trouble Code

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The air conditioning in my 2005 T&C stopped working. Right before it stopped there was a "burnt" smell coming through the vents. What happened?


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Oct 10, 2010 | 2005 Chrysler Town & Country

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Heater core


If anti-freeze is actually coming out of the drain tube then yes, you could very well have a bad heater core. You may also be able to smell antifreeze while inside the vehicle if it is leaking. [Its a kind of sickly sweet smell] If just clear water is dripping out then this is most likely from normal condensation that is collecting and dripping off of the air conditioning evaporator core as the air conditioner runs. This condensation collects in the heater, a/c housing then drips out of the same little drain. Water from normal condensation will evaporate off of cement or pavement pretty quickly but antifreeze takes quite a while to evaporate away and feels slimy to the touch. It doesn't take much of an antifreeze leak before the cooling system gets low on so make sure you don't run low on coolant which can cause the engine to overheat.

Jul 11, 2010 | 1994 Pontiac Grand Am

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Every time I turn on my air conditioning a powerful stink is emitted from the vents. It's really bad now - it used to be just the first couple minutes, and now it's for a solid 10 minutes every time. It...


Get the cores cleaned and be sure that the drain is clear and flowing.

One thing to do is turn off AC and still blow air through it, on high, for 2 or 3 minutes at shutdown. What you are trying to do is dry the evaporator of condensation. MUCH less smell on next power on of AC.

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Audi 03 avant


Hi Radu Smile!

The bad A/C smell is probably due to mold built up in the evaporator coil and evaporator condensate catch pan which is under/behind the dashboard... Most car A/Cs do not have filters, though that is a good idea, and I'm not that well versed on Audi, so it might possibly have one to keep the evaporaor coil clear and efficient. I have also seen bad smells come from small animals who somehow get inside the car ventilation ductwork and died, but that is a distinctly different odor, and you can, I'm sure, tell the difference, and it would not likely diminish as the sytem ran.

To rid the system of odors, you will need to gain access to the evaporator coil and catch pan under/inside of the dashboard inside a large housing with ducting going to the vents and defrost ports, posititioned toward the center or toward the passenger side of the dashboard. The refrigerant lines that pass through the firewall lead directly to the evaporator. You will need to open the evaporator coil enclosure, or open an access door, and this set-up varies from car to car - some have the blower motor as part of the assembly - but this is the likely source of the odor and it must be cleaned to get rid of the it.

First, with a bristle brush and hose vacuum cleaner (with corner nozzle attachment) brush the evaporator coil and condensate catch pan in order to loosen up the lint/dust build-up. Then **** up as much of this debris as possible with the vacuum. Once you've cleaned these as much as possible (this is an impossible area to get squeaky clean), use a spray bottle with a dilute chlorine bleach solution and generously spray the coil and inside the housing. ***Be careful not to let the spray get on upholstery or carpet, as it WILL cause a bleach stain! (plastic drop covers might be a good idea here)*** Allow this to dry --- this will kill ALL organic growths that cause such odors in the time it takes to dry. Follow that up with a spray of a good disinfectant / air freshener (such as Lysol) in your favorite scent, spraying a little on the carpet and upholstery for good measure, and then carefully put it all back togeher.

Your bad smell problem should now be gone for a year or two! And cleaning the evaporator coil also has the added benefits of improving cooling efficiency AND air flow!

This should put a smile back on your face, my friend! Please don't hesitate to comment or ask for further assitance if you have difficulties or questions, best of luck, and let us know how it goes!

Thanks!
-WildBill

Jun 20, 2008 | 2004 Audi A4

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