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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 does check engine light mean in 2005 Mazda 6?
The check engine light (service engine soon) comes on and stays on when a problem is detected by the self diagnosis system of your vehicle. Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to a parts store or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.
What causes misfire in cylinder 2?
Faulty: spark plug, spark plug wire, ignition coil, ignition module, fuel injector are the most common. Coolant leaking into a cylinder is another.
Internal engine problems such as burnt valve, broken valve spring, bent push rod, worn rings
How do you turn off the check light in your 2005 Scion xb?
The check engine light is on because there is a problem with the emissions system. Have ECU scanned with OBD 2 scan tool. This will retrieve the code set by the computer. This code will tell you what part is being effected. Not necessarily the defective part. Once the problem is repaired you can reset the light with the scanner or it will reset itself after a few driving cycles.
What are the most common causes of check engine light malfunction?
The most common causes of check engine light malfunction are a faulty oxygen sensor, loose or faulty gas cap, or a faulty catalytic converter. These are all easily fixed problems.
What happen replace battery without turn off engine?
First of all - tHe engine will stop as soon as you disconnect the battery. Secondly - you risk being electrocuted if you do that !
How do you reset the airbag service light on a 2005 Chevy silverado pu?
The airbag service light is on because it has detected a malfunction. The malfunction may prevent your airbag from deploying properly in a crash, so it is important to trace the cause and repair it. The best approach is to take the vehicle to a competent repair shop where they will connect a scan tool to the airbag module and identify the malfunction. Many airbag system malfunctions are covered by the vehicle warranty, so the dealer may be the best place to start.
Something in the speedo circuit has possibly failed and the computer set a code for it.. Have it checked for codes.
P0449 Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
make sure your gas cap is on tight. sometimes this will make your check engine light come on.
What does P1613 engine code mean on a 98 vw passat?
Trouble code P1613 means: MIL Call-UP Circuit Open Or Short To B+
Why does a 1997 Honda Civic LX's check engine light come on?
because something is amiss. Go to Autozone and ask them to run the codes. That will tell you whats wrong and what needs attention. The first time mine came on was at 100,000 miles. Was due to a worn gas cap. It's an emissions problem and you can take it to the dealer (any dealer) and they should fix it for free. '97 civcs have a 150k mile emissions warranty so it shouldn't cost you anything. My light came on and that's what it was. I had the catalitic converter & O2 sensor replaced for free along with a full tune up and oil change for free. This was at 97.5k miles too. Check it out.
Why does the service engine so light come on when you am going up hill in my1999 suburban?
One of the sensors is tripping the engine light. Codes need to be retrieved. Problems could be O2 sensor and or Catalytic Converter.
How do you disconnect a Chevy Cavalier check engine light?
I had the check engine light on for about a year and it caused me to fail inspection. Simple solution to that one. A sensor had to be replaced. But like the previous answer, I wouldn't mess around with it. Get a diagnostic check done to get the code and determine the problem. Another thing that I have heard that could cause the problem is pumping gas into it while the car is running. That has been known to set it off. It needs to be reset at the garage.
you don't theres a reason for that light go to a repair shop and have it fixed.
Disconnecting this light with the intent to sell a car and conceal problems is illegal. Removing the light to pass inspection is also illegal. If you get caught doing either you could get fined or go to jail.
Any Cavalier in the world right now isn't worth more than around $10 G's, and if you're not rocking a brand new one (which I doubt you are if there's a check engine light on) it's probably only worth about $2K. Just get it fixed.
The sensor in question is the downstream catalyst monitor (O2 sensor) located on the exhaust pipe that comes off of the front exhaust manifold. But we really need to establish something so that you do not replace parts unnecessarily. A fault code from a sensor, especially an O2 sensor NEVER automatically means the sensor is bad. It means the PCM (main car computer) sees a reading that it doesn't like from that sensor.
In the case of an O2 sensor code, it means that the O2 sensor is either too rich or too lean, or not responding fast enough to suit the PCM. It could be a bad O2 sensor, or what usually is the case, is that there is a problem that is forcing the O2 sensor to read out-of-normal range, something like a vacuum leak, engine misfire, or in the case of your catalyst code, a bad catalytic converter.
The funny thing is, that you may actually replace the catalyst monitor (Downstream O2 sensor), and erase the code, then drive it, and think that you've fixed it, but you haven't. That particular code is a low-priority code, so it takes several consecutive drive cycles with that same problem, to get it to turn the light back on.
Don't blame Ford, blame the EPA. They are the ones who decided that the system has to operate this way for all cars sold in the US.
How long will your check engine light say on after running out of gas and refueling?
It should be off right after you gas up. open the tank filler and unscrew the cap,now screw the cap back on and clockwise. Make sure it clicks at least three times. It should be off now.
What does it mean when the low oil pressure light is on in the Hyundai Santa Fe 2004?
The low oil pressure light means exactly that, your engine's oil pressure is low. First off stop the engine and check the oil level after about 5 mins to let the oil drain back into the oil pan and get an accurate reading. See if you are low on oil. If you are top it off to the full mark. If your oil level is fine, and the oil pressure light is coming on, your oil pump may be going out, I find it hard to believe that with it being a 2004 that you have that many miles on it to tell you that the engine may need rebuilding BUT if the engine's maintenance has been neglected and no one has changed the oil and filter, the dirty oil circulating through the engine can cause your bearings to wear out warranting a rebuild. Let's hope it's just a case of either low oil or the oil pump is going out.
There are seals in the valve cover that over time can detereorate and cause oil to enter the spark plug tubes. This oil can then seep between the plug and the wire which can make a better path to ground then the spark plugs gap would and cause a misfire. answer The bottm oil ring on the piston could be broken and instead of that ring wiping the oil off the cylinder wall as it goes on the down stroke, the oil is still on the wall and then egst pushed to the top and included in the combustion chamber. The oil will foul the plug and yes it will set off a msifire. Get a compression check on all 4 cylinders and see what reading you have. All it is is a pressure test. There is a pressure gauge you can buy and screw it into the spark plug hole and get readings yourself if you so wish.
Why is your ABS light on in your 2003 Chrysler Town and Country?
It is important to know what the warning lights mean when they light up. The ABS light comes on when there is an issue with the Brake system in a car.
Why do you lose power at 70MPH with the ECM light on in a Vauxhall Corsa 2001?
Weak fuel pump?
Bad fuel filter?
Bad air filter?
Plugged catalytic converter?
I had the same problem with my Corsa, changing my mass air flow meter fixed it!!
Why does the check engine light come on when starting the engine of a 2002 Hyundai accent?
If it is just coming on while you start the car and then going off while the car is running, that is normal. If it is staying on after the car is running, it could be that the cap to your gas tank is not completely closed. The cap has to click atleast 3 times when you close it. I have had this problem on mine before.
Why is your 97 ford explorer shaking and check engine light flashing?
A flashing check engine light is usually a misfire.
See related questions below.
A flashing check engine light is usually a misfire.
See related questions below.
Where is the location of the check engine light on a 1999 Ford Ranger?
The check engine light on a 1999 Ford Ranger is between the full mark of the
gas gauge and the left turn signal arrow
