2001 Saturn SC2 Check Engine Light - ON Code: P0133 - O2 Sensor Circuit Slow Response Bank 1 Sensor 1 I would like to repair this myself. Does this code refer to the front or rear O2 Sensor? If the front sensor, how many front sensors does the Saturn SC2 have? Need advice on repair difficulty level? things to lookout for? anything you think would help, thanks!
Is this a 4 or 6 cylinder?
if a 4 cylinder it will only have 2 o2 sensors
V6 will have 4 o2 senors which the sensor will be the right side of the engine first sensor.
1st sensor on exhaust, I recommend if you change one change all, as this will make the computer when it rechecks the system you have all clean/fast responding sensors.
if you have a slow response it means the sensor is dirty and not reading well, which is usually caused by minor misfires that the engine computer dismisses, so a tune up would be recommended too.
2001 Saturn LS 200 4 cylinder it stalled on now it won't start it cranks but won't start
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Thanks for all the helpful advice... it was very helpful. I will start with an oil change and some new spark plugs. If the check engine light remains on after that, then I will go ahead and change the o2 sensor.
I had the same on my 2004 corolla, when I replaced the upstream o2 sensor, the code changed to 420, I'm still working on that one.
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