A lot of modern cars can appear to be ‘running just fine’ but underneath the covers it’s pulled timing, altered fuel trims, etc. to appear normal and/or avoid damage but the computer stills knows that’s not a normal situation and alerts you to the problem. Unless you hook a scanner up and actually find out what the idiot light I telling you then you can’t be sure if it’s a false positive or not.
A lot of modern cars can appear to be ‘running just fine’ but underneath the covers it’s pulled timing, altered fuel trims, etc. to appear normal and/or avoid damage but the computer stills knows that’s not a normal situation and alerts you to the problem. Unless you hook a scanner up and actually find out what the idiot light I telling you then you can’t be sure if it’s a false positive or not.
Exactly. Modern cars are great at compensating for poor maintenance, but that doesn’t solve the problem.
Maintain your cars properly and they won’t need to compensate like this, meaning you’ll get better fuel economy and largely avoid costly repairs.