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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 is problem repalced egr o2 sensors and check engine light still on?
Have the system checked for codes. That will lead you to the problem.
How do you reset check engine light on a 1993 Isuzu truck?
First off repair the problem that set the light or it will just come back on. You can try disconnecting the negative battery cable for 5 minutes. If that does not work you will need to have it reset with a OBD2 scan tool.
Turning off check engine light on 04 silverado?
check the owners manual or the easiest way is to go to your local autozone and use their scanner tool to reset the light
Your lights on the dashboard of your 306 won't light how do you change lights on the dashboard?
IF it is the all the dash board lights it is probably a fuse, else if it only one light the switch on the is probably gone that lights up that light. There are no dash bulbs a they are LEDS so the chances of them blowing is slim
What is Chrysler engine code p0441?
Trouble code P0441 means: Evaporative Emission System Incorrect Purge Flow
How do you reset the check engine light on a 1999 Honda Accord?
Most check engine lights can be reset if you know the pinout on the diagnostic plug by doing a simple jumping of terminals . To find out which terminals are involved consult a repair manual or if you have an Advance Auto Parts store nearby they can hook up the diagnostic computer and reset the check engine light. One other industry standard is to disconnect the battery , and then reconnect it . You may have to leave it disconnected for 20 minutes or so to reset the light, Again check a service manual- the library is a good place to find one without having to buy one(they are expensive) . Motors or Chiltons are usually pretty good quality and informative. The reset procedure is usually in there but may take a bit of searching to find . Hope this helps Use an OBD (On Board Diagnostic) scanner to find out what's wrong. Fix the problem then the light should go off. It's often an oxygen sensor or something equally trivial. By taking it to a professional and have the problem that the computer has detected repaired. pull the "Backup/ACC" fuse from the main panel under the hood. Wait 15-30 secs and replace it. However, this will reset all of your accessories as well and you will need to re-enter your security code on the radio to get it to work. Pull the codes from the computer, match the code to the troubleshooting procedure, follow the procedure to find the source. Repair the source, light will go out if that was the only problem. There are "monitors" or self tests the computer runs the car through a drive cycle, if a problem occurs, it may not run all of the self tests until that problem is taken care. Therefore, another problem may exist. It is emission related. OR hook up a scanner that is capable of clearing codes, and hope that none are still active. The " check engine light" is by far one of the most misunderstood technological advances by the public. I am sure I will revise this as time goes on, as it is an in-depth understanding for the public. It is a warning light that is illuminated when there is a problem with the EMISSION SYSTEM only. Emission system being the pollution control system. Don't get a hard on against it as it is a good thing once you understand it. One point that was brought up a a recent meeting of technicians was that the amount of hydrocarbons is greater when the gas cap is left off than when the engine is running. Hydrocarbons are part of pollution emitted as gasoline evaporates. Going a step farther, one facet of the emission system is the "Evaporative" portion. This is when the fumes from the gasoline are leaking from the system into the outside air. This is one part of the emission system that can trigger a check engine light. I would say that about 7% of the vehicles that have a check engine light are the result of a loose or inadequate gas cap. But understand that many scenarios are possible with the "check engine light" The vehicle's powertrain computer (note that some vehicles have 17 different computers) will run a series of self-tests. They will only run under certain criteria. And they can be vastly different from manufacturer to manufacturer. Some self-tests are not run until preceding ones have run successfully. So if there is a problem in one particular area that is preventing another self test from running, you can have a situation where one problem is fixed, but another still exists. If you fix a problem and drive the car through a drive cycle that sets the monitor (or self test) the light will go off as it passes that criteria that triggered it in the first place. After 1996, the auto industry went to a idea called OBD II (on board diagnostics). This was to get all the manufacturers onto a similar plane for troubleshooting and powertrain control. While they still differ vastly, many corrections and adaptations were made for technicians to better fix the check engine light problems. Prior to this there were so many different and poor troubleshooting data from a check engine light problem that resolving the problem was much more difficult. Many early warning light of this nature were set to illuminate based on mileage. An Oxygen sensor was one of the things that were meant to be replaced when that mileage was hit. This is much like many current "Change oil lights
Read the computer code by using the appropriate code scanner then you'll know for certain. The computer has stored a code to indicate what's wrong with the engine.
Check the speed sensor.
this means there is something going on with the engine. take it to a auto parts store and they will scan for the codes, for free. to tell you which curcuit its in. its a possibility that its a bad tps, or throttle cable, etc. God bless!
probably, abs eror light.because my citroen bx has got same type light.
hi from turkey
That light is the "water in diesel fuel" light. Ive had it on in my 405 diesel too. Does it look like a bucket with water in it with lines on the side? yellow?
YOU MAY WANT TO CHECK THE MASS AIR FLOW CENSOR. IT MAY NEED TO BE CLEANED OR REPLACED. ALSO MAKE SURE YOUR AIR FILTER IS CLEAN. if you really want to see what it is open the hood and have someone start it. Find the mass air flow sensor and as it is running tap lightly on it. If it straightens it out that is the problem if not i say go to the iac valve and replace it. That was a common problem with probes. The iac is called an idle air control valve and is usually around 60 to 80 dollars at autozone. ===================== The pins on the connector for the mass air flow sensor can become lax over time as well, causing the engine to not receive proper signals from the MAF. Take off the connector and push the metal connectors down so they apply pressure to the other side of the connection once it is plugged in again. Just something free to try first before buying parts. Also consider pulling the codes from the engine by jumping some test connectors in the engine compartment. Do some searching on the net, and you should be able to find out exactly how and what codes mean what. Check the main air intake hose as well, on the older model Probes at least, the hoses crack, and when gas is applied, the engine will move slightly, opening up the crack in the hose, and causing a massive vacuum leak. -Shaun
Most likely it means your oxygen sensor needs to be replaced. However, there are a couple of other reasons why. It is common for the Check Engine Soon Light to come on if you have recently filled up with gas and did not tighten the gas cap enough. Or, the gas cap is bad, allowing air to seep by. Check your gas cap first. If the check engine soon light does not go out by 4-5 trips, go to an autoparts store that will check the code for you.
How will you reset the service light on a 97S70 Volvo?
dealer only
**edit**
This is not true. dealerships want you take them your car and charge you a 95.00 service fee to do this. here is the procedures for some cars.
Volvo 1999-2000 - S / V / C70 Models * Press and Hold odometer reset button
* Turn ignition switch to "run" position
* After SRL flashes, release odometer reset button
* Turn ignition off
* Turn ignition back on to confirm reset Volvo 1998 - S80 Models * Turn ignition switch to position 1
* Press and hold the odometer reset button
* Turn ignition switch to position 2
* Wait until service light blinks and then release odometer button Volvo 1999-2000 - S80 Models * Turn ignition switch to position 1
* Press and hold "day counter reset button"
* Turn ignition switch to position 2
* Continue holding day counter for approx. 10 seconds
* After SRL flashes, release day counter button
* Should hear "beep-beep" to confirm command accepted Volvo 2001 - XC 70 Models * The following steps must be completed with no longer than 5 seconds between each step: * Make sure the trip meter is in T-1
* Turn ignition key to position 1
* Press and hold trip meter button until zero is shown
* While still holding the trip meter, turn key to position 2
* When original trip mileage returns, release the trip reset button
* Turn key to off
Your question is a bit vague, but here goes.
If your Check Engine light is on, or if you're experiencing
problems with your car, you might want to
have the codes read. You can have this done at most
auto parts stores at no charge.
The car's computer spits out these codes to help diagnose
problems. The auto parts store guy or gal, can translate the
codes for you or, you can look here; http://autorepair.about.com/od/obdcodedatabase/The_Exhaustive_Database_of_OBDI_and_OBDII_Engine_Codes.htm
and probably find what the codes mean.
Alternatively, you can buy your own code reader to perform
the checks yourself.
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What is the code p1683 on a Jeep Liberty?
P1683. Speed Control Power Relay Or Speed Control 12 Volt Driver Circuit
What is the difference between the check engine light and service engine soon light?
The Check Engine light comes on when the ECU detects something is wrong with the emissions system on the vehicle. You will need to have the ECU scanned with an OBD2 scan tool. The Maintenance Required light comes on to alert you to the fact that some scheduled maintenance, as outlined in your owners manual, is due. It can be as simple as an oil change or can be something else. Look in your owners manual to find out what service is needed.
Can the check engine light on a 2005 Jeep Liberty be turned off?
I would try disconnecting the battery....that may reset the computer chip.
Why would check engine light come on Toyota Camry 2001?
There are dozens of reasons. But in most cars of this model some sensors just become old and have to be replaced. When sensors fail ECU sets off the check engine light.
Lack of heated upstream oxygen sensor switch. Sensor indicates lean bank one. The code refers to an O2 sensor that shows a lean condition. The sensor could be defective or you could really have a lean condition. Things like vacuum leaks, low fuel pressure and such will cause that. The MAF sensor could also be dirty and should be cleaned, since it's quick and easy (also cheap!) to do.
Buy or borrow an engine code scanner and see what's wrong. It may not solve all of the problems but at least it will give you an idea of some of the difficulties that the computer detects.
