Many times check engine light comes on and we took it to autozone and they said error code P0133 and probable causes are 1.Oxygen sensor defective 2.fuel system running rich or lean-check other codes first.
What does this mean?
What should we do?
Should we change oxygen sensor? if yes what is the cost effective place to buy it?
What about the other probable reason?
what should we do about fuel system?
Check engine light autozone said error code P0133 Saturn 2004 ION 2?
P0133 is a slow responding O2 sensor.....O2 sensors have a life expectancy of 100K miles depending on driving habits and other conditons....This code is due to a O2 sensor failing....I would change the O2 and doing and a fuel injector service and or tune up if need be would not hurt if the car has not had a complete tune-up......but ultimately the O2 should be changed because the code is for a failing O2 not a vacuum leak or fuel system issue....although both can cause an O2 to prematurely fail...... I would get an A/C delco or a bosch O2 sensor not a universal O2......the cheap universal O2 sensor are not good and will not last....spend the extra money and get a quality O2 or you'll be buying another cheap one in 6 months if you don't......pay now or pay later....;)
Check engine light autozone said error code P0133 Saturn 2004 ION 2?
This code is telling you that your car is running to lean/rich. This could be caused by a false reading from the o2 sensor meaning it is bad or it could be a bad catalytic converter. It also mentions the fuel system because it could be caused by a bad injector or fuel filter. Given the year of your car im going to lean towards a bad 02 sensor or bad fuel filter. Filter is a couple bucks so i would try that first. If nothing i would try the 02 sensor. Remember that when you change something you either need to have the codes cleared or you need to pull off the battery for 10 minutes to reset the check engine light. Best price is probably going to be at autozone or ebay.
Slow oxygen sensor response is typical when oxygen sensors get old. I'd go with a new O2 sensor on this one. But you can double check the waveforms with a scan tool to be sure.
The O2 sensor measures the amount of oxygen in the exhaust. If there is too much in the exhaust, the car is running too lean. If there's no oxygen in the exhaust, the car is running too rich.
You can get the O2 sensor at an auto parts store.
I wouldn't do anything to the fuel system with this code.
Check for vacuum leak first.
