What is wrong when engine light turns on?
The check engine or service engine soon light comes on to alert you that there is or was a problem with the emissions system on your vehicle. If the light comes on steady and stays on, it means that there is a problem and you should have it checked out soon. If it comes on and flashes, it means you will cause damage if you continue driving.
How do you reset the check engine light on a 1998 ford ranger and theres nothing wrong with the engine?
The computer turns on the check engine light in hopes that you'll check the engine codes. It means something is wrong. Use an engine diagnostic scanner to find out what it is. It's easy to do and you can usually borrow one from your local auto parts retailer, they'll often help you figure out what it all means.
Do you have to bring the car in even if the check engine light is on and nothing is wrong with the car?
Something is wrong if the check engine light is on. If the engine is running great then there is no great hurry to get it fixed but there is something wrong with the emissions system or the light would not be on. It is your choice to fix it or not. It may never cause any problems and it could damage the O2 sensors or the converter depending on what is wrong.
Why does the check engine light come on for a random engine misfire on a 1996 gm sonoma It has already had a complete tune up?
Why will a 9th generation Mitsubishi Galant's check engine light come on when nothing is wrong with the engine?
What does it mean when a check engine light comes on but turns off after a few seconds It is a 1993 Mazda 323 hatchback with a new battery timing chain head gasket and oxygen sensor?
There are literally hundreds of things that can turn the check engine light on. You need to have the system checked for codes to know what to diagnose. And sometimes it might be an error with electronics. My moms engine light ha been on since 2008 winter. When she asked omeone to look at it nothing was wrong.
It means that either the on-board engine monitoring has detected a fault or the vehicle is due a service. Often. the light can come on because there has been an unexplained electrical surge(spike) on the data bus and nothing is actually wrong. The local dealership can pull the diagnostic codes off the car and reset the lamp.