"Service Engine Soon" light is on.

We have had On Board Vehicle Systems since 1983,
some 30 years,why do people still ask these questions

Real simple

You need an owners manual
You need to study OBD2 Systems-on internet

You always have a problem & always have to
check for codes & always have to diagnose &
repair the issues EVERY TIME ANY Light Comes
On Your Dash.

Usually one is a service vehicle soon and the other service engine soon. They are different. The service vehicle soon is telling you the body has an electrical issue and the service engine is telling you you have a powertrain issue. If you get the codes pulled from the engine at auto zone or another big box part store for free and post the codes we can help. This we do first. Then we can worry about the service vehicle soon.

Hello. The ABS [anti-lock brake system], traction control and service engine soon light are all interconnected. The ABS and traction control each depend on sensitive sensors to send a signal to your car's computer that there is a problem. The problem unfortunately is that the sensors themselves are bad. If your brakes still pump themselves when you stop fast, for example, then your ABS system is still working but one of your sensors is sending a signal anyways.
To check everything out you can take your car to many auto parts stores, or most recently AAMCO transmission stores, where they will scan your computer for free. Once the scan is done you will know exactly why the service engine soon light is on.
In the meantime, you do not need to worry about your brakes because all the ABS system does is pump them for you. You can still pump them yourself, like folks did for years before ABS came along. Same is true with the traction control. As long as you do not drive wrecklessly you need not worry.
So to summarize, call around to auto parts stores, or AAMCO to get a free scan. Once you have those results you can decide on how to proceed.
Here is a great link if you want more information. http://www.aamco.com/Check_Engine_light_on-FREE_Check.asp
Regards, Joe PS kindly rate my answer. Thank you.

If it's the indicator that literally says "service engine soon", and not the check-engine light, then you have no worries. That's programmed to come on at set intervals to remind you that routine service may be due soon (oil change, inspection, tire rotation, etc). It's not an indication of failure. Failures will be shown by the check-engine light. That one is nothing to worry about. Your owner's manual should have a procedure to turn it off.

Sometimes you have to wait a week for the light to go off, the computer has to go through several start/run/stop cycles.

there is no need to worry about this light, but it will have to be attended to soon, it will not hurt the car to run it with the light on, read below why this service engine light comes on, could not have written this better myself. this light is called different things by different car makers, this explanation is generic and applies to all cars made after 1996 by federal law.

Why my Check Engine/Service Engines Soon light comes on?
The engine computer or PCM/ECM
All modern vehicles have a computer or the ECM (Electronic Control Module) that controls the operation of the vehicle powertrain (the engine and transmission). The main purpose of this is to keep the engine running at top efficiency with the lowest possible emissions. With constantly growing demands for better fuel economy and new strictest emission regulations it's not very easy to achieve. The engine parameters need to be constantly and precisely adjusted according to various conditions such as speed, load, engine temperature, gasoline quality, ambient air temperature, road conditions, etc. That's why today's cars have much more electronics than in early days - there is a large number of various sensors and other electronic devices that help the vehicle computer or ECM to precisely control the engine and transmission operation and monitor emissions.
The vehicle computer system has self-testing capability. When the computer senses that there is a problem with some of the components it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and your car needs to be looked at. To properly diagnose what is wrong, you need to take your car to a mechanic or a dealer. The technician at the dealership or a garage will then hook up the scanner to the car computer and retrieve the stored trouble code(s). Then he (she) will look it up in the service manual provided by a car manufacturer. The service manual contains the list of possible codes (about few hundreds) and describes what each code means and what needs to be tested. The code itself doesn't tell exactly what component is defective - it only indicates where to look, what engine parameter is out of normal range. The technician will have to perform further testing to pinpoint a defective part

Hi,this sounds like air in your engine coolent,circulating in to the heater core.This is very common ,to free the air let the engine run with the radiator cap off for at least 15 minutes or more some my splash out as the air comes out.The olny worry about this is to put a pan under the radiator cap area so as to not spill it on the ground ,cats ,dogs,children go after this because it taste sweet.This has to be it or in the A/C Heat blend doors thats all that moves behind your dash.there are wires miles of wires and vacume hoses ,relays ,switchs and the back side if radio and instrument cluster ,nothing else there to make noise .I hope this helps you .

I would have the codes pulled. Some autoparts stores will do this for free. there may be a code stored in the cars ECM (computer)

replace o2 sensor.

1. Take apart the dash.
2. Locate the lightbulb for the service engine soon light.
   
3. Remove it.
   
4. Replace dash.
   
5. Enjoy your worry-free driving experience.