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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

2003 gran marquis the car shakes and the check engine light is on and blinks what could be the problemthank you?

If your check engine light is blinking , an engine cylinder misfire has been detected

The vehicle needs to be scanned for trouble code(s) to diagnose and then repair the

problem

What does a Flashing check engine light on a 2003 F150 mean?

An engine cylinder misfire has been detected if your check engine light is flashing

Turning off check engine light on 1993 ford ranger?

Try disconnecting the battery for 10 minutes or so. Reconnect it and then start the vehicle and see if the light turns off.

How to turn off the Check engine light on 2001 Hyundai elantra?

if light is on then there is a problem. you can disconnect the battery terminals (both) for about five minutes then put them back on. light ill go out for a little while but if there is a problem then it will obviously come back on. maybe O2 sensor. go to advanced and use their hand held. its free.

Check engine light was not on inspection emissions test performed and light came on and stayed on Why?

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 AutoZone 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.

How do you reset the check engine light on Subaru Impreza?

Dsconnect the negative terminal from the battery. Flick lights on to discharge and residual current, and let the vehicle rest for some time. Upon reconnecting the negative terminal carefully, drive the car in the normal way. If the c/e light reappears, you have a fault and need to ascertain in which system the c/e light is displaying an error.

How do you check engine light on 1998 Chevy Malibu?

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.

Check engine light stays on Nissan Pulsar n16 how to clear codes?

If the check engine light stays on for the Nissan Pulsar n16, you would need to check the engine in order to clear codes. You can take the car for service and the problem will be diagnosed and restored to normalcy.

How do you clear automotive codes?

You mean DTC's? (diagnostic trouble codes). You have to have a scan tool to connect to the cars computer via the obd, or obd2. That s one way that the factory feeds the dealership business. You have to take it to a shop to get that cleared. When I used to run the shop for Chevy, the owner there, even though you canset some of the keyless entry fobs with a paper clip, saw those as his bread, and butter, combined with the dtc resets we probably made a half a million a year just on that fluff. He would get mad at us for going over to a friends house and using the paper clip methos because it took money from his pocket. Ya know, here is a better example. Here in Nevada we have legal brothels, but, they are quite a ways out of town. At one time, or another I have worked at all of them. I had a limo business, and figured, what the hell, I am going to start an escort agency here in town, and run hookers under the wire. Well, one of the brothel owners pulled me over, bought my license on the spot, then, put all my old girls to work at his place, and shut my business down right there on the spot, then made me sign a no competitions agreement. I said what the heck was all that about? Why would you buy it to shut it down? He said, ya know, I pay my fee's, have all the proper licenses, and do everything by the letter of the lw. You come in, step on every law you can find, and cut into my action. Not right. Since it was you, I bought it, but, anyone else I would have had them shutdown, one way, or another. Same with the dealerships. And the owner I worked for took very good care of us, first, but then made his demands. I remember a salesman drove his brand new Ford Mustang to work, and parked it in the saleman of the month spot, right next to the owner. It still had placcards on it from the local Ford dealer! Now. I have never actually been present for one of these grand moll seizures, and I do not ever want to see one again! Now this guy made $150,000 per year, so, I'm guessing he was worth a mill, or maybe even a mill and a half to this dealership. This carried no weight, whatsoever. Once we were able to get the owner put back together, he went into a speech to all of us, about how we make our living from GM, and about product pride, and loyalty, ect. I really learned a lot from that man. He is a smart man. I really miss working for him. If in Reno, and you need a new Chevy, go see the Stanko's at Champion. Good folks.

96 mercury cougar cylinder misfire on?

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 reset check engine light on a 2001 Toyota Tundra?

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 an abs light come on?

The ABS (anti-lock brake system) light comes on because the computer has detected a problem and set a code. The code will stay in the computer even if the light goes out. You need to have the system Scanned for codes. Once the cause of the code has been repaired the light can be shut off by clearing the code.

Most auto repair shops will have Scanners and all the equipment to Diagnose and repair the problem. And, Most auto parts stores can plug in a diagnostic scanning device into your vehicle to read the trouble codes at no cost if you purchase the parts necessary to repair the vehicle from them. The trouble codes can tell you THE AREA where the problem is with your ABS system. So it's wise to have a Tech check that circuit to isolate what the problem actually is.

In order to reset this light you need to have access to a Scan tool that does more than just read the codes. Other diagnostic equipment may be needed as well.

You have a problem with the ABS. As long as the light is on the ABS is not working. The light will remain on until the problem is fixed.

AnswerThe ABS system has stored a fault code. You'll need to have someone scan the ABS computer to read the diagnostic code. Typically, ABS codes are not available to inexpensive conventional OBD scanners.

ABS = Anti-Lock Brake System

If you have this light come on while not braking, it most likely means there is a problem with the electronic controls in your brakes. If it comes on while you are braking, it means the Anti-Lock has kicked in. It should only do that however, if you are braking really hard. Addendum: It is very important to have the above procedure done to diagnose the cause. It might be minor but it could be as important as a wheel bearing, and a cracked hub, which if damaged could cause the wheel to become loose and you could lose control. I've added this addendum because I was told by a mechanic not to worry about the ABS light, that it was a minor problem. Only to find out later that in many vehicles the ABS sensor is attached to the wheel hub and a malfunctioning bearing can cause the sensor to slip., causing it to turn on.

Where is the PCV valve located on a 1990 Toyota Camry?

There is no PVC valve on the 4cyl Toyota Camry. ÊThe location of the PVC valve on the 6cyl is center upper engine area, mounted in the rear valve cover.

What does code p0412 mean on a 1993 Mercury Sable?

Secondary Air Injection System Switching Valve A Circuit Malfunction

What is check engine light p1780 on a Toyota Camry?

Trouble code P1780 means: PNP Switch Malfunction

Specifically, Park/Neutral position switch malfunction

This code can frequently be traced to broken wiring in the left trunk hinge area. The wiring in this area is subject to a lot of flexing. Simply remove the black insulation and examine each wire for breaks.

Why might a 2000 Hyundai Accent engine light be blinking?

A blinking or flashing check engine light in any Hyundai is indicative of a misfire taking place. It could be due to a faulty ignition.coil, leaky ignition wires or bad or worn spark plugs.

Why does the speedometer on your 1991 Honda accord ex automatic stop working and the engine light come on with a rough idle then start working?

Im not sure about this. but check the distributor wires.Meaning take off the cap, and rotor and the moisture cover. There should be three wires, I know one is for the r.p.m gauge. Take them off individually and check for corrosion from the moisture. It needs to be bare metal for good electric conducting. Just wipe them off, and make sure the fittings are firmly snug when snapped back into place.

What does the warning light in yellow that looks like an oil can with a squiggly line underneath mean?

it means get some oil You may also want to refer to another post about the 'oil warning light' coming on after several hours of driving... this is likely caused by a faulty or leaking LOW pressure sensor. This will need to be replaced ... the beeping and flashing light can be annoying.

Resetting the change engine oil light on a 2000 venture?

Not sure about your Venture, but Chevy trucks are: Turn ignition to run (do not start engine). Press gas pedal completely to the floor three times in five seconds. Wait 10 seconds (if you have one of the oil life monitor screens, watch for it to blink.) Turn ignition switch off. Start the vehicle.

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