how do you stop the check engine light from coming on after service on a prizm 2001?

Question

I have replaced the oxygen sensor, replaced the hoses, tightened the gas cap, new battery, how can I stop it from coming on? TThe engine is great no blow by runs like a tuned violin except for this. thank you for your answers.

Answer 1

(Check Engine Light)
There are many components that work together in the engine to maintain optimal engine performance and economy.
A service engine soon, or check engine light indicates that there is a sensor that is reading a condition that is "out of range".
Simply resetting the light does not solve the initial cause of the problem.
Replacing a number of parts trying to troubleshoot the problem in the hopes of getting the light to stay off is a tremendous waste of time and money.
The simplest, and most economical way to alleviate your issue, is to have an engine diagnostic done by a reputable shop to determine what caused the computer to signal you to begin with. Just reading the computer codes may not find the "cause".
That being said, if per-chance you feel the need to reset the light in the hopes that it was a "glitch" of some kind, you could disconnect the negative battery terminal for a couple of minutes to clear the check engine light.

Answer 2

As long as everything is good, all sensors ect.... then the CEL will stay off. The Check Engine Light comes on when a problem occurs, sensors mostly. If the light ever come on, scan your computer, get the code and fix your car.... that is the only correct way to fix your car....

Answer 3

Occasionally, a check engine light will stay on after replacing a sensor...it has to be cleared in the computer memory...scan tools let you do this easily. If it still come on after clearing memory, then you have other problems...