Hi.
At Autozone they read the OBDII codes stored in the main computer. Errors triggered by parts such as the BCM (body control module), or the security system do not get read with a generic OBDII scanner like the one used at Autozone.
You need to go to a GM dealer. They will read the codes using a Tech 2 scan tool that can pull out codes from the several different modules that can trigger the service engine soon light. The service is usually billed half hour labor.
Before visiting the dealer you can check battery voltage (12.5 off - 13.5 engine on) and fuses. There are problems like low voltage from battery or some fuse that cause the light coming on and do not store any code in any of the modules.
Note: the service engine soon light can often be reset by disconnecting battery. If the light is on, then there are codes stored somewhere. I recommend visiting the nearest GM dealer and finding out what is wrong.
Hi.
I know that the light turns on when service is due. Since you did emission test I assumed service and oil change had been done regularly.
There are many different problem that trigger the light. One of them is the fuel cap. Even if it is tighten, if the fuel cap lost pressurization the light will come on. As I said, a good solution is paying $80 to the dealer and letting them take care of the problem.. There is a recall on 2004 Vue fuel cap, I do not know if this affects some of the 2003 models. There are lots of recalls affecting Saturn Vue, and the truck light is very sensitive. See here recalls.
About resetting the light...the seven times works only if light is on because service is due. You can try resetting by disconnecting battery. Be sure that car stereo does not require anti theft code.
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Service Engine Soon does not throw a code - this is just "hey you need an oil change" or something else that is regular maintenance. IIRC to reset this warning, put the key in the "on" position with the engine off, and sweep the accelerator pedal from stop to stop 7 times within 5 seconds.
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Hello. Service engine light does mean oil change in my vue. I actually have a change oil light that lights up when I am due for an oil change. But I did do wha you said, and to be sure I didit correctly, I switch from the gas to stop, gas to stop, etc 7 times or from gas to stop, stop,etc 7 times. I did both actually and light is still on. Any other suggestions?
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