Check engine light stays on, then goes out when fuel is at 3/4 tank. Stays out for a while then comes on and stays on until reach 3/8 tank fuel level. Goes out for brief period, then comes on again. Cannot pass smog with this issue. Had codes checked, but tech said no codes coming up, there is no apparent reason for the light to come on. Is there a way to reset light so I can at least get smogged, then explore the issue afterwards?
I suggest scanned the computer in order to know fault codes stored there, soud like a EVAp or Emissions failing.
If the Check Engine Light comes on in the city but goes off on the freeway, then the fault is present during city driving conditions. Pay attention to whether or not the vehicle runs or drives any differently when the Check Engine Light illuminates. If vehicle performance does change, drive the car as little as possible and take it to be checked by a service professional as soon as possible. If there is no change in vehicle performance, you can drive home, but have it inspected as soon as possible. In this condition, you run a risk of the vehicle dying or not starting.
* The Check Engine Light comes on and stays on.
If the Check Engine Light illuminates constantly during driving with no noticeable driving or performance problems, there is a permanent fault in the emission control system. When this happens, the computer that controls the emission system usually has a backup program that runs while the fault is present. (These backup programs are often referred to as "limp home" mode programs.) You should get the vehicle serviced as soon as possible, but in most cases, the vehicle will continue to operate, though you run a risk of it dying or not starting.
Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.
Thank you for using FixYa, have a nice day
SOURCE: I have a 2000 Daewoo
that's the o2 sensor code. it should say catalyst efficiency. you either need to replace one of your o2 sensors ($52 at autozone), or it could be your catalytic converter.
1,283 views
Usually answered in minutes!
×