Question about 1999 Kia Sportage
99 kia sportage getting ready for smog. replaced both 02 senors, both cats, exhust manifold plus basic tune up, reset/erased all codes, but i still get the 02 codes please help
Massair flow meter or drawing air which confuses 02 sensor cos of wrong air fuel mix
Posted on Feb 15, 2012
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Posted on Jan 02, 2017
SOURCE: 02 kia fail smog high nox
if the engine computer says that you have a slow O2 sensor what it means is that the sensor does not react as quickly as it should and it needs to be replaced. nox is oxides of nitrogen, a product of too lean combustion which causes cylinder temps to go too high. it sounds like replacing O2 sensor will make it happy. engine computer is having a hard time controlling lean/ rich fuel mix because sensor is slow to register changes, needs to have response time in milliseconds or engine computer can't operate properly. O2 sensors do wear out, normal service item. hope that helps
Posted on Jun 17, 2009
Take it back and DEMAND that they restore your car to the previous fuel mileage....NO CHARGE! If they balk take them to small claims (it's cheap and you'll win) because they are trying to sell you a "pig in a polke"! I'm a retired Journeyman mechanic....and what they are telling you is the biggest sack 'o you 'no what.....Iever heard. Good luck to you.
Posted on May 28, 2009
How many miles, and have you had the fuel filter changed at all?
It could also be an O2 sensor. Try removing them. Tip should be a gray/tan color. If its green you have a blown head gasket.
Posted on Sep 12, 2009
Testimonial: "thanx 4 the help i change the fuel filter and car runs much better now but code remain the same but idleling is80% better now.God bless u. "
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