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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

When changing the 02 sensors and the spark plugs on a 1998 Nissan Maxima why would the service engine soon light still come on?

Have the service engine soon (check engine), same thing light scanned to know exactly what is the problem. You may purchase a cheap scan tool at some car shops like Canadian tire and scan the code yourself. Obviously make sure to change the defective parts with good parts and cancel the code afterwards. I hope this was helpful.

2000 Toyota Rav4 with 61000 miles and my check engine light came on I checked the gas cap and it's on tight any suggestions on what to do?

The check engine light indicates a problem with you engine that may or may not affect the way it runs, the only way to tell is to have the codes read at the dealer or a parts store that will do it for free and use the information gained to affect a repair.

On a 2001 aztek does anyone know the amps or ohms that the plug should be reading that connects to the EGR Valve you put a new one in and the computer still shows an EGR valve problem?

I searched my DVD and i cant find any specifications but looking head on at harness ends from the right whihc is cavity A to left which is cavity E these are the wires- A GRY 435 EGR Solenoid Low Control B BLK 2753 Low Reference C BRN 1456 EGR Solenoid Position Signal D GRY 2702 5 Volt Reference E RED 1676 EGR Solenoid High Control

Is a secondary air injection malfunction a serious problem?

On cold days, it can be a problem, but not minor or major. To fix this problem, read the following;

To fix the secondary air injection system, you'll probably need to replace the pump, which is called an "air pollution pump". It is part of the emissions. Prices range for around $150-$250. Also, you can tell if your pump is working by listening to the car on a cold day when the vehicle starts up. If you hear a wining noise, that's good! This whining noise is the pump working. The pump comes on to help limit bad vapor such as co2 from escaping into the atmosphere, however Its main function is to help warm up the car until the

oxygen sensors kick in, which can be anywhere from 60-120 seconds. If you don't hear a wining noise, and your check engine light is on, then you will probaly need to get you air pollution pump replaced.

How do you reset the check engine light on a 2002 Toyota RAV4?

Try disconnecting the battery for about 10 minutes - or have vehicel scanned to determine problem and have codes cleared

How do you reset 2007 Toyota Sienna check engine light?

How to Reset the "MAINT REQD" Light on Toyota Sienna With the car started (ignition on), set the LCD odometer readout to total mileage (not trip A or B). Turn the car off (ignition key to the OFF position). Push in AND HOLD the button/knob that switches the odometer Turn key to ON position without starting the car. You will notice the maintenance light blink and go out. Release the odometer button/knob. Turn key to OFF position. That's it! The "MAINT REQD" light has been reset to warn you to change your oil in another 5,000 or 7,500 miles or so.

1998 Mercury Mountaineer check engine light?

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 does it mean when the emission light comes on in a 2003 Ford Focus?

Could be several reasons - simplest one is that the gas cap was not screwed down tightly enough. Make sure the cap is tightened down and then drive the car for a day or two until the computer re-sets itself. If the light doesn't go out then continue looking for other causes having to do with the car's emission system. (i.e. - PCV valve needs cleaning/replacing - one of the hoses is plugged or kinked, etc, etc.

What does OBD II code P2181 mean?

cooling system performance. check the temperature sensor, thermostat and water pump. Could be one or a combination.

What would cause a 1999 Ford Escort ZX2 service engine soon light to flash once the car has hit 50 mph for a couple minutes and give a computer readout of 1 and 4 misfire and random misfire?

I would be suspicious of the ignition module.Mine had same problem I replaced the plug wires and now all better. I had #2 cylinder misfire reporting on 1998 Ford Escort ZX2. I noted that I could force SES light to flash at high RPM also. (Flashing light indicates misfire in progress. Serious for engine.) Replacement of plugs and wires resolved the issue. This was well overdue, and plugs showed burn damage to electrodes. It also could be your fuel injectors going out. Id change plugs and wires first, and see if it helps. Does it always come on only when you get to 50? Or does it come on when you accelerate, say, going uphill?

What is the engine light on the dash?

If it's on it means the computer has detected a fault with a component. You should get it checked out. If your engine light comes on you need to have your car serviced. An auto parts store or a mechanic can hook your car up to a computer diagnostic machine and tell you exactly what needs to be worked on.

How many hourse power does a 250cc lifan engine have?

There are many chinese/Honda clones : Lifan,Loncin,Ducar,Zongshen. .etc.

They have a very similar look, but most have pushrods instead OHV, the bore ranges between 63,65 and 67mm and the stroke acordingly.

The POWER claimed in the brochures is too optimistic : the truth ranges from12HP(200cc)

to 18HP(250ccOHV).

How do you turn off the check engine light in a 2005 ford explorer?

You turn off the check engine light on any vehicle by finding out why it is on and fixing the problem. That light is on because one of the electrical leads going to the engine's computer is saying, "We have a problem." You can hook up the car to a computer and find out what the problem is. You can attach a light down below the dash and count the number of times it blinks and check a chart to get the number and then compare the number to a chart and find the problem. Or, you can cut the wire behind the dash.

Turn off service light on seat arosa?

how do you turn of the service light on a 04 seat arosa

How do you reset the check engine light on a 2007 Dodge Ram?

You need to repair the problem that set the light and then use an OBD2 scan tool to reset the light. If you do not fix the problem the light will just come back on.

What is check engine code p0013?

P0013 "B" Camshaft Position - Actuator Circuit (Bank 1)

P0013 "B" Camshaft Position - Actuator Circuit (Bank 1)

Why the check engine light turns on and off by itself?

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 is your engine light is coming on and your temp gage is going up?

It could be that your coolant level is low or you have other coolant system problems. Whenever the check engine light is on, use a code scanner to find out why.

What is a cylinder 1 misfire on a 2003 VW Jetta?

cylinder 1 misfire, is probably a bad ignition coil, it plugs into the spark plug as a coil wire unit, if you have a v6 your #1 cylinder will start on the passenger side and #6 will end on the driver side if its a 4 cylinder #1 will be closer to the radiator and 4 will be closer to the front window, bad coil causes loss of power, and just a shakey ride, it can easily be replaced and cost about 30.00 bucks also think about changing your plugs while you're at it.

Why would the check engine light come on in a 2000 Maxima two days after your 90K mile service at a Nissan dealer in which they informed you that there was a crack in your manifold pan?

Your question isn't clear, but I'll offer a few thoughts. There are 2 manifolds, an intake and a exhaust. I'm not sure what you mean by "pan". It is possible that this can set a check engine light if one of the manifolds are cracked. If it is the intake it may be changing the air/fuel mixture or pressure. If it is the exhaust, depending on hte locations of the O2 sensors, it may pick up the wrong O2 content.

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