Dash lights on, everything fine on checkup

Hi. I've purchased this previously owned vehicle and the dashboard shows several lights illuminated, including VSC, Check Engine and Trac Off lights. The oxygen sensor was replaced but the lights are on again. The car was checked and I was told that everything is fine. Why are these warnings still on and how can I turn them off? Am I safe to drive the car? Thanks.
Experienced mechanics share their insights in answering this question :
The reason your Check Engine Light is on would depend on what the particular code stored states. As for this issue, I would recommend getting an engine diagnostic performed by a certified technician. Engine issues typically do not cause the vehicle to be unsafe, but may potentially cause the car to breakdown. As for the VSC and Traction Control Lights, these lights will usually come on if there is an issue with the traction control system.

Common issues that cause these lights would include faulty wheel speed sensors and broken tone rings. This issue will also not cause a safety issue. The first vehicles ever made did not come with traction control and some vehicles that are produced today still do not have traction control so your car is safe to drive. For best results, just make sure to have the issues diagnosed by someone who is qualified to these checks and inspections for your warning lights.

How to Identify and Fix Common car Problems ?

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The light indicates the traction control is functioning. Without traction control, when you drive, your vehicle may be susceptible to sliding or spinning out on the road. The TRAC system in your car should be shut off if you are stuck in the dirt, snow, or mud.
If the indicator is blinking, the situation is usually serious, such as a severe misfiring of the engine. This would allow unburned fuel to dump into the exhaust system, pushing the temperature of your catalytic converter to the breaking point.
The traction-control light is usually a sign that your vehicle is working properly by maintaining traction on a slippery road, but it can also mean that your car has some damaged sensors or wires. Keep yourself safe on the road by taking your vehicle to a trusted auto repair shop at the first sign of trouble.
Check engine light flashing and traction control light coming on at the same time could be alerting you of a misfire or a malfunctioning traction control system. Malfunctioning vehicle speed sensor or wheel speed sensors could also be causing the lights to come on.
Press the gas pedal 3 times in quick succession. Then, turn your engine on all the way and let it run for a minute. The TCS and ABS lights should reset and go away if there isn`t any underlying problem with your traction control system.
While the check engine light can definitely be indicative of serious problems, the most common cause of the flashing is usually an engine misfire. There are many reasons why an engine misfire might be occurring. To run smoothly, an engine must be receiving the correct amount of power from the cylinders in your vehicle.
Is it Safe to Drive with the TCS Light On? It is only safe to drive with the TCS light on if it appears when you are losing traction: it means the system is engaging. Driving without traction control can make your vehicle susceptible to spinning out and sliding around on the road.
Electronic Stability Control Explained

It`s almost always located as close to the very center of the car as possible. If you were sitting in the driver`s seat, the yaw control sensor would be under your right elbow, somewhere between you and the passenger.

Even a harsh transmission shift or badly misfiring engine can cause wheel spin and illuminate the traction control light.
Is it Safe to Drive with the TCS Light On? It is only safe to drive with the TCS light on if it appears when you are losing traction: it means the system is engaging. Driving without traction control can make your vehicle susceptible to spinning out and sliding around on the road.
While your car is typically safe to drive with the traction control light on, you should not drive it under certain conditions. If the traction control light, anti-lock braking system light, and red brake-warning light illuminate, your entire braking system may be affected.
If the traction control light won`t turn off, there can be some reasons. One reason could be that the fuse for the traction control system has blown. Or it could be that there is a problem with the traction control sensors causing the light to stay on.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

No dash lights, back right tail light is out, no parking lights. Brake lights work though as does head lights.
ANSWER : Hi there. In many cases, when you have electrical problems like you’re describing, it’s caused by multiple electrical component failure. It’s likely that a few electrical relays are not working; especially if you have systems that utilize the same components (such as your brake light and tail lights). I would recommend having a professional mobile mechanic come to your location to complete an electrical problems inspection first, so they can pinpoint what is damaged and recommend the right repairs.

Dash, Tail/brake, dome, trunk, glovebox, and door lights won’t work, dash doing weird things.
ANSWER : Hi there. Sure would appear a lot is going on electrically all at once. This could be, a problem in the PDC (power distribution center). The PDC is typically located under the hood and contains numerous fuses and relays. I don’t believe any one fuse will resolve all of the electrical issues. There is a possibility, it is not a power supply issue. It may be, the result of a poor electrical ground common to the inoperative components. Proper circuit testing should be performed. This would confirm the cause of multiple electrical failures. I recommend having your vehicle’s electrical problems be diagnosed and repaired by a certified technician, such as one from YourMechanic.

signals, daytime running lights are not working, park brake light on dash is on steady and chime is dinging steady 4×4 wont engage
ANSWER : This is likely a brake light switch problem. I would suggest testing the brake light switch which should be located down by the brake pedal. This may also be a computer problem as well as indicated by the other lights on in the dash. I would recommend having an expert from YourMechanic come to your home to possibly replace the brake light switch and diagnose with a scanning tool which will download useful data from the truck’s computer indicating what specifically the problem may be.

First, the fuse 19 keeps blowing. When I hit the brake pedal my dash lights up. The third brake light acts like a running light.
ANSWER : Hi there. Check the wiring on the vehicle to the tail and brake lights. There is a cross short that is causing the lights to blow the fuses and make the tail lights brighter than normal. If you need further assistance with your electrical issues, then seek out a professional, such as one from Your Mechanic, to help you.

Abs light, emergency brake light, steering wheel assist light, engine light, EPC light, traction control light
ANSWER : Hello, thank you for writing in. The vehicle does utilize a lot of the same sensors for these systems. Are there any other codes that are coming up when this code appears? If so you will want to take these into consideration when processing the repair and making a diagnosis. The module may be bad, and replacing it should fix the problem. The lights should turn off once the main computer recognizes the new module and the sensors sync up. If you believe the sensors need to be cleaned you may do so. Do as minimal as possible to make sure you are not damaging the sensor or disrupting the wiring inside. A bad connection would make the lights stay on. With so many lights that are effected by the module being illuminated, the module is likely bad or does not have a connection. Check the connection first and then resort to replacing the unit. For more help with these electrical tests, contact our service department.

Okay so when I turn my lights on at night my brake lights do not work, when I don’t have my lights on they work fine.
ANSWER : Hi there. Based on your inquiry, it’s highly probable that you have a damaged light switch or some electrical fault inside the turn signal relay. However, it’s also possible that the brake switch above the brake pedal could also be the source of your problem. Due to the fact that multiple electrical components might be causing this issue, it’s a smart idea to first have a professional mobile mechanic complete a brake lights are not working inspection, so they can determine what’s causing all of these issues and recommend the right repairs.

2012 equinox reduced power light engine light and traction light came on. Lost a lot of power got home and all light except engine
ANSWER : Your car has what is called a "safe mode" that will be engaged by the computer when it detects that something critical has gone wrong related to any of the major components in your engine chassis or power train. This may be related to a number of things, most of which should have been registered in the computer when the check engine light came on. I recommend having an expert from YourMechanic come to your location to inspect your check engine light and diagnose any codes registered by your vehicle’s computer.

Dash lights on, everything fine on checkup
ANSWER : The reason your Check Engine Light is on would depend on what the particular code stored states. As for this issue, I would recommend getting an engine diagnostic performed by a certified technician. Engine issues typically do not cause the vehicle to be unsafe, but may potentially cause the car to breakdown. As for the VSC and Traction Control Lights, these lights will usually come on if there is an issue with the traction control system.

Common issues that cause these lights would include faulty wheel speed sensors and broken tone rings. This issue will also not cause a safety issue. The first vehicles ever made did not come with traction control and some vehicles that are produced today still do not have traction control so your car is safe to drive. For best results, just make sure to have the issues diagnosed by someone who is qualified to these checks and inspections for your warning lights.