Question about 1999 Chevrolet Tahoe

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"Check Engine Soon" light stays on all time. What is the problem??

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The easiest thing you can have done is take your vehicle to the local parts store and have them scan your car for free. This will let you know what emission control system is faulty. The most likely out come is a bad O2 sensor. This is a cheap part to buy and not too difficult on most cars. The hardest part is getting to it. On some cars it is very tight to work on the O2. Others it is right in the open. A shop will charge around 250 to do this or the part is about 60. I hope this helps!! Thanks!!

Posted on Oct 06, 2010

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The "infamous" check engine light can come on for any of a couple of dozen reasons and typically a diagnostics meter is needed to determine the cause. Before rushing to the dealer or a mechanic there are a couple of simple things you can do yourself and possibly save some money. First, remove the gas cap and the replace it being certain it is screwed in completely. If that doesn't help open the hood and make sure the oil cap is secure. You might want to check your oil while your there. If this fails to correct the problem you might want to go to autozone.com and register for free. This free registration give you access to dozens of repair manuals which may have the solution to your problem

Posted on Oct 06, 2010

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BeninVa
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SOURCE: 1992 4.3L V-6 Chevrolet C1500 Check Engine Soon Light

There are literally many malfunctions that can turn that light on. You probably need someone with a code reader to pull the codes and go from there.

Posted on Jan 02, 2010

  • 181 Answers

SOURCE: check engine soon light stays on

THIS IS A WARNING LIGHT YOU SHOULD TAKE IT IN A GET A CODE READ AT LEAST. BETTER SAFE THEN SORRY

Posted on Feb 11, 2010

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1 Answer

What does the service engine light mean on a 2015 Ford Edge


Service Engine Soon

If the Service Engine Soon indicator light stays lit after you've started the engine, the On Board Diagnostics system (OBD) has detected a malfunction of the vehicle emissions control system. Contact your authorized dealer as soon as possible.
If indicator light is blinking, an engine misfire may be occurring, which could damage your catalytic converter. Drive in a moderate fashion (avoid heavy acceleration and deceleration), and have your vehicle serviced immediately.*
The Service Engine Soon indicator light illuminates when the ignition is first turned on (prior to engine start) in order to test the bulb, as well as indicate whether the vehicle is ready for Inspection/Maintenance (I/M) testing.
Normally, the Service Engine Soon light will stay on until the engine is cranked, then turn itself off if no malfunctions are present. However, if after 15 seconds this light blinks eight times, it means that the vehicle is not ready for I/M testing.Check this link out Gary.
https://owner.ford.com/how-tos/vehicle-features/dashboard-instrument-cluster/warning-lamps-and-indicators.html

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I suggest scanned the computer in order to know fault codes stored there, soud like a EVAp or Emissions failing.

If the Check Engine Light comes on in the city but goes off on the freeway, then the fault is present during city driving conditions. Pay attention to whether or not the vehicle runs or drives any differently when the Check Engine Light illuminates. If vehicle performance does change, drive the car as little as possible and take it to be checked by a service professional as soon as possible. If there is no change in vehicle performance, you can drive home, but have it inspected as soon as possible. In this condition, you run a risk of the vehicle dying or not starting.

* The Check Engine Light comes on and stays on.
If the Check Engine Light illuminates constantly during driving with no noticeable driving or performance problems, there is a permanent fault in the emission control system. When this happens, the computer that controls the emission system usually has a backup program that runs while the fault is present. (These backup programs are often referred to as "limp home" mode programs.) You should get the vehicle serviced as soon as possible, but in most cases, the vehicle will continue to operate, though you run a risk of it dying or not starting.



Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day

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