Question about 2002 Kia Sportage

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O2 sensor engine light stays on, smell gas in kia as it warms up on cold days

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O2 sensor is probably bad and so the car is unable to make proper adjustments to the air/fuel ratio. What you likely smell is your car running rich, meaning there is too much gas for the amount of air the engine is taking it resulting in gas that is getting burned completely and is going out through the exhaust. Is probably going to decrease your gas mileage. You should probably get the o2 sensor checked out.

Posted on Nov 19, 2009

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When my 1990 subaru legacy is cold it runs good then after 10 miles it starts skipping engine light comes on and a strong ordor of gas can be smelled. it does not run hot but when it starts to cut bac


Could be a faulty O2 sensor. The sensor would not take action until the engine warmed up. Have you checked for trouble codes in the engine computer ?

Jul 28, 2014 | 1990 Subaru Legacy

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Car does not heat up despite debater being on and letting ca run for 15 minutes


There are several things which come to mind. You have 2 complaints. A gas smell and a cold blooded vehicle.

Starting with the temperature problem. My initial concern is whether the thermostat is weak, but also that the automatic controls may be inoperable and working against you. The car is suppose to go into a temporary "cold start routine" which increases the RPM and makes the fuel rich. (This could contribute to the gas smell)

After the Temperature sensor and O2 sensors warm up, the idle is suppose to drop and the fuel mix should lean out. If the engine remains at high idle, the water pump will work faster with the engine spinning faster. Sometimes there is not a direct 1 to 1 ratio between the heat generated by the motor and the RPM versus the cooling produced. An idling engine may warm up faster than an engine running at higher RPM.

Another problem may be the Defroster setting. There are Thermal switches which are suppose to cut off the Electric Radiator cooling fans. When the Defroster is activated, some cars are built to spin the A/C compressor in the Winter. But the Electric Radiator cooling fans may also switch on as part of the A/C system. This would super cool the radiator at a time when you least want it. Check to see if the cooling fans are activating when the Defroster is turned on.

There can be 2 Temperature switches in your car. One would send the signal to kick out the "cold start routine" and the other would work the guages or indicator lights.

The O2 sensors can have heaters in them or they can just be slow. If you leave the engine idling like you do, they could foul out and be sluggish to warm up.

If running the Temperature at 80 degrees causes an additional 5 minutes of warm-up time, you may be better off setting it for say 72 and having it work sooner.

The thermal sensors are not that expensive. Work on a cold engine when changing them. Note what I said about your rich fuel mix contributing to the smell.

Please rate my info.

Jan 05, 2013 | 2005 Ford Five Hundred

1 Answer

I have a problem with my 1988 Buick Century, 2.5L 4 cyl engine. I think it has to do with maybe the MAP sensor. Problem: when it's really cold outside, I can not get the engine to start unless I floor...


a bad thermostat-testit--have car scanned for bad codes--giv it a tuneup-new plug wires and distributer cap--then throttle body and idle air cleanin--get a haynes book at parts place

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1 Answer

I have a 2006 Freestar with a 3.9 Engine . When it is cold it has a miss when i step on it. But it gets better when it starts to warm up. Almost seems like a spark plug miss


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O2 Sensors--change at 100,000 miles (front 2 only)
Gas Filter--every 3 years/30,000 miles
Air Filter ---every 3 years/blow off once every year
MAF Sensor---Clean once a year or more often

Ignition Coils--- most definitely will go bad,at
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When cold, it isn't in closed-loop, and runs on
Long Term Fuel Trim--not on O2 Sensors ,until
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Let it warm up at least 4 minutes in cold weather,
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1 Answer

Kia sedona 2002 smell gas in the interior of car


Sounds like you might have bad O2 sensors, leaking fuel injector O rings or a bad fuel pressure regulator. Check that the vacuum hose to the pressure regulator is connected and no cracks or holes in it. Any check engine light?

Jan 07, 2010 | 2002 Kia Sedona

1 Answer

2000 Pontiac Sunfire, 2.2 litre engine, automatic. Suspected bad heater in O2 sensor. Idles really rough when first started up in the morning. Exhaust smells really gassy. After engine warms up runs great...


i wouldn't be looking at the o2 sensors! look at the coolant temp sensor! when the car is cold it doesn't correct fuel & air ratio until it is warm so it is not looking at the o2's till then! if the sensor is bad and telling the computer it is warm when it is cold them it would be leaned out and run like that then when the car gets warm it's fine because the sensor is still saying it's warm! would be the opisite if it went bad and was telling the computer it was cold! that is a sure sign of the temp sensor being bad! good luck

Sep 18, 2009 | 2000 Pontiac Sunfire

1 Answer

Check engine light 2002 kia rio rxv


common problem with the 4.2L is o2 sensors, depending on the code. you need a obd11 scan tool and it will tell you which bank is faulty. your vehicle has 3 o2 sensors.

Mar 08, 2009 | 2004 Ford Freestar

1 Answer

2002 kia rio rxv..check engine light came on..


This could be an O2 sensor or sometimes with lower grade gasoline I have seen different cars act this way. If the O2 is not bad try mid to super gas or fuel system treatment/cleaner to see if there is a change. I know in my area there is mostly 10% ethanol which will lower octane. I hope this helps!

Jan 30, 2009 | 2002 Kia Rio

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