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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

How do you reset a service light on a ldv convoy?

turn on ignition, dont start it. hold down brake and throttle pedal fully for about a minute or until light flashes.

sorted

Why is your smart meter blinking green?

A blinking green light on your smart meter typically indicates that it is successfully communicating with the utility company or transmitting data. This often means that the meter is functioning correctly and actively sending usage information. However, if the light is blinking rapidly or if you have concerns, it may be worth checking with your utility provider for further clarification.

What causes check engine to blink on and off?

A blinking Check Engine warning light is far more serious than the normal one. The car has now become a danger to drive. A blinking Check Engine light means a number of things which all are reasons that need to be taken seriously. My first word of advice is, if you already haven't get the vehicle to a mechanic ASAP. the reason being that the car has not only become a danger to you but everyone around you in some cases. The blinking light can mean anything from an engine misfire, which can cause permanent damage to any part of your vehicle weather it be transmission or an air filter. It could also be the spark plugs. If the light starts to blink as soon as the engine is ignited, shut it down. Check the spark plugs because this could lead to an electrical misfire messing up the vehicles onboard computer and safety systems. Another reason could be the gas cap, if it's not screwed on right or it's loose this is another possible reason, if you fix this problem and the light is still there take the vehicle to the mechanic ASAP. What ever the reason be cautionary and still take the vehicle in for service

Will cheap gas make your check engine light come on?

The check engine light 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.

What is wrong with the Lincoln ls v8 when the check engine light lashes?

There are a couple of hundred things that can cause that light to come on or flash. Guessing can get very expensive so I would recommend you take it to the nearest parts store. Most of them have a digital reader and can tell you exactly what the problem is and how to correct for the least amount of money.

Will a bad alternator cause the check engine light to come on?

yes it can. i had a 2004 ford mustang that kept reading that the camshaft position sensor was the cause. Changed the cps and still same code. changed alternator and the code cleared itself!

What does check engine light mean on your ml 320?

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 servise engine soon mean in 1999 taho?

That means there is a problem in the emissions system are the transmission and other places too. You need to have the engine scanned with an engine scanner to see were your problem is.

How do you check for engine hydrolock?

pull spark plugs

cycle engine by turnkey or manually if water is spit out you were hydrolock

What does flooding engine mean?

Flooding an engine simply means that there is TOO much gas in your cylinders, and you have to wait until they drain before you press the gas, or start the vehicle. The more you try to turn the vehicle over, the more gas will be injected. So let the vehicle sit and wait or press the accelerator to the floor to increase the air in the mixture and leave it there until the engine starts.

Will a headlight out cause your service vehicle soon light to come on?

Yes it will. The Service Vehicle Soon light is for the BCM (Body Control module. If any bulbs go out, like the headlights, turn signals, reverse lights, etc, it will trigger the SVS light. The BCMs in newer cars control ALL lighting. This is why in newer cars, if you leave the dome light or headlights on, you can never run your battery down because the BCM shuts it off before it can drain the battery.

Hope this helps

Matt

What does it mean when your check engine light blinks on your 2004 Ford Freestar because I changed the spark plugs and wires and the blink is still there any thoughts?

You need to have the vehicle checked with a scan tool. You most likely have a miss in one of the cylinders. The scan tool will tell you which one. Once you know that, remove the plug to see if you have spark. If you do you need to check compression. If you do not have spark, try swapping wires on the coil pack with the missing cylinder wire. If still no spark, you most likely have a bad coil pack.

Numbers 1, 2, 3 cylinder are on the back side of the motor. Number 3 is closest to the drivers side. To get at them you need to remove the cowl.

In my 2001 Windstar's case, it was a bad coil pack.

See "Related Questions" below for lots more

What does it mean if a check engine light comes on in a 2002 Dodge Intrepid?

It means that there is a problem with the emissions system. Have the computer scanned with an OBD2 scab tool to retrieve the code that has been set.

What is check engine code P1443?

This code indicates an incorrect Evaporative System Purge Control Valve flow. Can be caused by clogged, disconnected, or broken vacuum line between the EVAP Canister Purge Valve and intake manifold or bad Purge Valve itself.

What does OBDII code P0445 mean?

Trouble code P0445 means:Evaporative emission control systempurge control valve circuit shorted

Will unhooking the battery reset lights?

In some cases unhooking the battery for a few minutes may reset the check engine light. However, if the problem still exists the light will come back on. Also be aware that the computer is making constant adjustments to keep your car running at it's best. When you disconnect the battery the computer also resets so your vehicle may run poorly for a few minutes while the computer optimizes all the settings again.

What would make the immobilizer warning light and engine light on and the RPMs go down to zero on a2003 Hyundai tiburon se you replaced the engine with a 2004 Hyundai tiburon se engine?

your question makes no sense. the imobilzer would be if you disconnected battery.it shouldn't matter if you replaced it with a 04 engine. unless you have a bad crank position sensor. or a bad ignition switch for security.

What causes a Caravan 2000 cylinder misfire?

Misfires can occur in any internal combustion engine and they are cause by any of these three things:

-No spark (For SI engines)

Gasoline engines need spark to ignite the fuel air mixture in the cylinder.

-No Fuel

This one is pretty self explanatory

-No Compression

All thermo engines need compression to promote combustion and to increase efficiency

Suggestions:

You probably learned about this misfire from the car's onboard computer. This means that you should check each of the above systems and pay careful attention to those lines/wires/gaskets that are near the troublesome cylinder. Inspect the spark plug and wire for that cylinder. Check for adequete fuel pressure and compression. I would check compression last because your car is relatively new and you shouldn't have too much loss of compression yet (unless you've logged 200,000 miles already). Also don't forget that fuel injectors act like electronic valves and if one fails it won't get any fuel to its respective cylinder, even with fuel pressure that's within specifications.

Why does the 1987 Caprice classic Service Engine Soon light come on then turns off?

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.

Why does the check engine light come on in 95 ford econoline club van?

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 flashing on on a 03 ford expedition?

CELs are usually related to the emissions control systems on OBDII compliant vehicles. One common reason for a CEL is fueling with the engine running. The engine performs a vacuum test which will throw a code if the fuel cap is open. Aside from the annoyance of the light, it's generally not a smart idea to fuel up while the engine is running.

A code reader can pull the code and shed a little light on the exact reason for the CEL, and stores such as Autozone have offered a free code reading service in the past.

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