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Check Engine Light

The check engine light comes on in a car when the engine is experiencing a problem. Ask questions here about your car's check engine light.

7,238 Questions

What cause the check engine light to come on in a 1987 grand marquis?

The Check Engine Light comes on when an error code is sent to the Car's Central Computer. Take it to a servicer who can download the code and tell you what's wrong. It could be any one of a thousand things wrong.

What does VSC mean on Check engine light?

VSC stands for Vehicle Skid Control System. This light warns there is a problem somewhere in the vehicle skid control system or traction system. If the light goes out within 60 seconds this is normal. If the light remains on you should have it checked out. It is still safe to continue driving.

Will check engine light turn off on its own if problem is fixed?

Yes, once the computer has run its diagnostics enough times with passing results it will clear the light.

How do you fix check engine code P0442?

You start with diagnosis. You need to determine the reason that DTC is coming up. For that particular DTC, it could be as simple as replacing your gas cap. Or it could be your evap sensor. You might have a hole in the EVAP system. You need to figure out what the issue is before a successful repair can be made.

Check engine light codes 2002 Hyundai accent Plus the airbag light blinks 5x any clues to what needs done to fix the problem The airbag blink only happens when starting the car?

Hello. Check your owners manual. Your question seems a little vague, but heres what should happen when you first put the key in and turn it to the run position (or just after you have started it), pretty much every light on the dash will come on, just as a test of the bulb. That way you know that the bulb is working, so if you do have a problem you can fix it. The flash is just testing the bulb and drawing attention to itself. If it stays on after its running (permanently) then there is a problem. Hope that helps

Why does services engine light stay on and cruise control doesn't work on a 2003 GMC Envoy?

There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.

Why does the check gas cap and engine light come on -2002 ford escape?

You probably have an EVAP system leak. The fuel cap could be loose or faulty.

What is OBD2 code p0505?

p0505 code mean Idle Air Control System. And I need to know the information of your car, then I can help you.

Service engine soon light on a 1993 Bonneville?

There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.

Why is the check engine light on on your 2000 Chevy Monte Carlo?

Usually a problem in the emission control system - have vehicle scanned to determine the problem

How do you reset the check engine light on a 1998 Chevy Cavalier?

Re-set? There is a problem that needs to be addresed. This car has OBDII. If there is no problem it will shut off on it's own. Get it to a Independent garage that knows Diagnosing. One common problem I have seen is a loose gas cap, but don' bet on it.

easiest way to reset the stored codes is to disconnect the battery for 15-20 minutes... both terminals... just in case...fire it back up and it should be good to go with no warning lights on unless there is a defeinate problem

How to reset an Engine Check Light on a 2001 Toyota Sequoia?

you should be able to clear it by removing the negative battery terminal for a minute or so. though hopefully you have repaired the problem that caused the light to turn on in the first place!

What makes the speedometer and tachometer stop working?

There are 2 sensors on the engine that sent a signal to the computer and speedometer and tach. When one of these goes bad it can make the speedometer and tach go all over the place and also just stop working. This can also cause all types of engine running problems because the information being sent to the PCM will be incorrect all so. The units are easy to replace once you find them, it seems that they are located in different areas of the engine with each year the vehicle was put out. Your local dealer should be able to tell you the location of each sending unit. .

AnswerIf your speedometer is not working, it is probably the speed (distance) sensor. There are tons of sensors. Follow the speedometer cable down to where it attaches to the sensor...Unplug speedo cable, pull elec plug, remove 10mm bolt, pull out, replace is opposite.

(This is not the same sensor as the input or output sensors)

How do you get to the lights in the dashboard of a 1998 Ford F150?

It is risky fooling with the dash lights as the circuits can be damaged with static electricity. I suggest taking to a garage.

How ever, you can get a static electricity band to prevent that from happening. Most parts stores, such as Autozone, Advanced Auto Parts and O'Reillys all have the bulbs for you dash indicator lights and a good book like a Chiltons will tell you how to remove the dash.

Why does a 1999 Nissan Frontier check engine light go on and off after fixing four spark plug misfired and resetting it?

you probably have plugged egr ports . it forces the # 4 cylinder to eat all of the recirc gases thus a # 4 clylider miss fire. mine was easy to clean , it has 4 pipe pluge on the egr manifold that are in line with the ports that go into the cylinder DAN

How do you reset the check engine light on a 2001 Acrua TL and do you have to have the dealer reset it?

There is a fuse you can remove but if you do not have a service manual to ID the fuse I would not recommend this. The easy way is to go to your nearest autozone and tell them your check engine light is on, the employee will hook up the hand computer to read the code. After he reads the code tell him that you want he to clear the code from your on board computer.

Inside the owner's manual it tells how to reset this check engine warning light. I have found that in my car this light comes on about every 7,000 miles, or whenever the oil should be changed. Here is how its done. While the car is off, depress both the Reset and the Select buttons up on the console near the hazard button. Keep them both depressed while you turn the engine on. Keep holding, because within 10 or fifteen seconds the check engine light will flash. This is the signal that the switch is reset and you can let go of the buttons. That's all there is to it.

In the 2001 ACURA user manual it states that it takes three drive trips to reset the check engine light and if it comes on repeatedly it should be checked. as for the SRS light it could be reset by shorting the system but not recommended I did it a few times and it could damage the engine timing control, car will run a high RPM lights will not work on your info pannel ect.

My Oldsmobile shakes on idle and while accelerating but then calms down the faster you go engine light flashes but in drive no shaking this happend before 4 months ago lasted 15min whats going on?

You need to have the code read. Even if the light goes out the code will stay around a few on-off cycles after. Any good auto store will usually do this for free. It sounds like a bad knock sensor, but you need to have the code read to know for sure. Good luck.

How do you turn off the engine ligh in a 2002 Chrysler 300M?

Disconnect the ground wire under hood right side (passenger) 15mm nut holding cable to stud on strut tower. if there is a active condition fault, the light will come back on. Autozone will read your codes for free.

Most legitimate codes will stay on even after you try disconnecting the negative battery cable, or you cycle the ignition switch 5-7 times. This can happen if the chip in your key is bad ( Even if everything else works fine) It will try your patience and will sometimes mimic an exhaust leak code or a code that leads to a bad seal in your gas cap. If your lucky to find an extra key as I did that slid in between the shifter console consider your self Lucky or Else you will have to purchase one at the Dealership.

It is a common problem and its due to having too much weight on the Key ring which will cause premature ignition switch failure and also cause the casing of the microchip to crack , causing failure of the Key Chip itself.

P.S. Storing coins in your ashtray is a bad idea, They can fall out and in between the shifter console and keep your shifter half engaged causing MAJOR Transmission Damage costing 4,500, been there didn't Like The Price to replace it.

How do you turn off the service engine soon light on a Mercury Villager?

Either have the problem that is causing the light to illuminate fixed or disconnect and reconnect your battery.

What does Chrysler 300 Dash board malfunction indicator light mean?

A Chrysler 300 dashboard malfunction indicator light is another form of the check engine light. This light appears of the dash when the engines computer reads a problem in the engine.

Need to fix check engine light?

You do not need to fix the check engine light you need to fix the problem that is causing the check engine light to come on. Most auto parts will scan your ECU for free and tell you the code that has been set. This code will tell you what parts are being effected.