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Please take articles like this with a grain of salt. " an oxygen sensor is usually what triggers a pesky check-engine light." This comment right here is very misleading. Although a bad O2 sensor can trigger a light, O2 sensor don't go bad as often as some folks state. There are many reason an O2 code can be triggered. The O2 sensors have a fixed parameter it operates in, anything that can cause the exhaust to operate outside of those parameters will trigger and O2 light. Such as , misfire, vacuum leak, low engine temp, bad reading on intake air temp. As you can see the list can be very long.
What should have been said is a check engine indicates a problem was detected within the engine control system and should be checked out for the cause.
With all the electronics and technology advancements... It would be nice if they have in-built diagnostics to have the vehicle find out the cause when a 'check engine' light comes on.
If CARMD can do it, why can't the car manufacturers? ;-)
What the heck! The people in your picture are not wearing seat belts. A convertible with 2 kids in the back seat, no seat belts, top down.
Leaving my car in the garage seems to be the best way to help my monthly gas tab ! Sort of like keeping yourself from being overweight - - - keep your mouth from being used !