Check Engine Light

It will do no good to turn it off, It will just come right back on if you didn't fix the reason and problem that made it come on.

There is a problem with the emission system or Transmission. You need to have the engine scaned with a OBD2 enginer scanner to see what is wrong. Some parts stores will scan it for free just call some and ask them if thay can scan it for you. You will need a scanner to turn it off.

To start, the Ignition key must be in position II, engine not running. Locate the two diagnostic sockets just inboard of the washer fill cap. The "A" connector (shown above) has a jumper that is stored in the lid of the "A" diagnostic connector. The jumper is used for both diagnostic connectors. Listed below is the information retrievable from the various connections. A1 Transmission B1 Climate Control A2 Fuel System B2 Cruise Control A3 ABS B5 SRS A5 TCU (Transmission Control) B6 Power Seat A6 Ignition System A7 Combined Instrument Normally "Check Engine Light" information will be found in A2. Put the jumper into A2 and push the black button for one second. Count the red LED light as it blinks back information, blink, blink, pause, blink, blink, blink, pause, blink, blink, is an example of the response you would receive. 2-3-2 would be the code retrieved, now push the button again for one second, again count the blinks, keep checking for codes until one of them repeats, this means you have read all the codes. Now to clear the codes, push and hold the button for 6-7 seconds, release and as soon as the LED comes on push and hold the button for another 6-7 seconds. Now push the button for one second and read the codes again, you should get 1-1-1 (no faults). You Must Read All Codes before Clearing. Turn the ignition off and then start the car, the check engine light should be out. It is always a good idea to check for codes, clear them and then drive the vehicle to see if they return before replacing parts. The transmission can ask the check engine light to be turned on, so if you try clearing A2 codes and they wont go away try reading the transmission (A1), clear them , and then go back to A2.

After contacting a Volvo dealer, they recommended the Haynes series of manuals for the 850, each section details the codes and faults detected.

it sounds like you need to change the spark plugs and possibly the ignition wires

I have 98 Malibu 3.1. Miss-fire cyl #5 started in 2004. Changed spark plugs and wires replaced injector 5. Problem seemed to be gone. Came back couple years later. have replaced wires and plugs switched coils and still miss-fire #5. I live with problem. Never dies and clears up after 5-10 min. Happens when hot and sits for less than 1 hr.

ANSWER: Sounds like it might need a tune up at the very least. Take it to AUTOZONE or most any aftermarket auto parts supplier, they can hook up a reader to your car and find out what code is being generated which will tell you almost exactly what is wrong. Most places are glad to do this for free since they are hoping you will buy your repair parts there.

Low Colant level, Bad thermostat, Bad sensor, cracked head

The engine computer has detected a malfunction and set a code.

Trouble code P0440 means:Evaporative emission control system malfunction

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.

Your motion detector light may not turn off due to several reasons, such as a stuck sensor that continuously detects movement, a malfunctioning timer setting, or interference from external factors like heat or motion from pets. Additionally, if the light is set to a constant "on" mode or the sensitivity is too high, it may not turn off as intended. Checking the settings and ensuring the sensor is clean and unobstructed can help resolve the issue. If the problem persists, it may indicate a faulty unit that needs repair or replacement.

sounds like your mass air flow sensor is going bad, i had the same problem. just unplug it and see what happens.

huh?

no, not unless it rusts the radiator and all the fluid leaks out

Not likely, but corrosion to some sensors that monitor your cooling system could. Antifreeze should be flushed and changed annually to protect the engine's cooling system from freezing and internal corrosion that can cause premature wear to more expensive parts.

It means exactly what it says, low oil pressure. This means you should not drive this vehicle until you get the problem corrected. The oil pressure is not high enough to safely operate the engine. Otherwise you will have severe engine damage.

something broke

it is a enhanced traction service light simple sensor

There are a few ways you can go about doing this:

1. a Volvo dealer2. a mechanic who works on volvos3. you own the service light reset tool.

you can buy the service light tool at www.ipd.com it will cost about $180.

direct link to tool:http://www.ipdusa.com/ProductsCat.aspx?CategoryID=519&NodeID=4564&RootID=629

If it was actually caused by a loose cap, it will reset itself in a few days.

You have to hook up an OBD scanner to it. Most auto parts chains have one available, and can run a code diagnostic for free.

Usual cause is a misfire.

See related questions below.

Not sure what you mean cng, but if you are talking about your check engine light on your car it means, you need to go to a car repair shop(the type you have if possible) and they'll put it on a computer that tells what is wrong. Can be a lot of things!!First you can see if you have enough oil in your car, and check all the fluids. But after that it could be a lot of things, from a missing fuse(under $1 to fix up to worst case , a cracked engine- which might not be worth fixing)

If you have an oxygen sensor in your vehicle running on cng can trigger that which causes your check engine light to come on.

Check the speed sensor on the top of the tranny. This will tend to build up with metal shavings and cause the sensor not to read the speed of the transmission.

Code 44 indicates a lean mixture at the oxygen sensor and it could be a variety of things from a vacuum leak, a bad fuel regulator, or a bad fuel pump. Also those engines were known for bad distributor shafts. It is best to take it to a mechanic.

often the "check engine" light will come on with no apparent problems in any car. there is an array of sensors, actuators, valves, and wiring that is monitored by a computer in the car. if the computer "sees" something that doesnt match a predetermined parameter, it will turn the light on. for example, if your gas cap was left loose, after certain driving conditions are met, the computer notices that there isn't any pressure in the gas tank. federal laws say at this point, there should be pressure there. so the computer turns the light on. there would be no problems with the engine itself, just the emission system, but it turns the "check engine" light on to warn you that your car car is no longer meeting federal standards for emissions.

Sometimes there is a false warning light.

To Check:Turn off all accessories and have the key out of the ignition. Disconnect the negative battery connection for about 30 seconds and then reconnect. This action resets the computer and may make the light go out if it was a false alarm. If the light comes back on, then it is possible that you have an actual problem.

I am not a mechanic, but own a 1999 Sebring. The "Check Engine" comes on for a myriad of reasons. The only way to find the fault is to read the code. This can be done using an engine code scanner, either do-it-yourself or taking the vehicle in to the shop. A third method involves turning the ignition key in a specific sequence which causes the light to flash the numeric code - kind of like a crude Morse code. For a 1999 Sebring, a common code is the "multiple cylinder misfire." This just says that one or more spark plug(s) failed to fire. If this occurs when changing speeds (entering or exiting a highway, for example) then the EGR valve may be the culprit. I've read that it goes bad on these vehicles. If the vehicle has more than 70k miles, then the fuel filter needs to be replaced, per the maintenance schedule. A clogged fuel filter may also cause piston misfires. Good luck.

FOR FREE YOU CAN TAKE YOUR CAR TO ADVANCED AUTO AND THEY WILL READ THE CODES AND TELL YOU WHAT IT IS CALLING FOR FOR FREE. AND ALSO RESET THE SERVICE ENGINE LIGHT IF YOU WANT THEM TO. BUT THEM YOU WOULD KNOW WHAT THE CAR IS TRYING TO TELL YOU. ALSO YOU CAN TRY TURNING THE CAR TO THE ON AND THEN OFF AND THEN ON ( WITHOUT STARTING THE ENGINE) AND IT WILL FLASH CODES ( BY HOW MANY TIMES THE SERVICE LIGHT FLASHS), JUST JOT DOWN THE NUMBER. IT WILL FLASH ONE OR TWO TIMES AND THEN START FLASHING BETWEEN ONE TO SIX TIMES. COUNT THE FLASH'S IN A ROW AND WRITE IT DOWN AND THAN WAIT AND SEE IF IT FLASH'S AGAIN AND WRITE THAT NUMBER DOWN, IT COULD TAKE A WHILE TO GET THIS DONE. BUT WITH INFORMATION IN HAND YOU CAN EITHER GOOGLE AND FIND YOUR ANSWERS OR GO TO ADVANCED AUTO OR A CAR PARTS STORE AND THEY SHOULD BE ABLE TO TELL YOU WHAT IS GOING WRONG WITH YOUR CAR.

There are many probable causes. You could have a bad (or broken) piston ring which would allow raw fuel to exit the affected cylinders during the compression stroke. You could also have a faulty EGR or PCV valve. You'll have to take the vehicle into a friendly local dealer so they can "scope" the engine.