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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 wrong with a 2001 Malibu with service vehicle soon and no dash or tail lights headlights and flashers OK?

Check the fuse first. It is in the fuse center under the hood in position 45. If fuse checks good then check the relay in position 19. You can swap it with one of the other relays.

It worked

Why is your check engine light on in your 2006 Chevy aveo?

It could be a NUMBER of THINGS wrong. It means there is a problem with the emission system are Transmission. Need to have engine scaned with an OBDII engine scanner.

Advance auto parts will scan it for free. You will have to repair the problem before it will go off.

How do you retrieve the check engine light in a 1981 Z28 Camaro?

The system you have on your Camaro is the one of the first system Chevy had where a computer was used. This system uses what was called the "CCC" (Computer Control Command) system. You should have a small flat 5 pin connector under the left side of the dash. This will hold trouble codes that are present when the check engine light is on. With this early system you cannot jump across terminals to read the codes like the later (OBD I) systems. If you have a Snap On MT2500 scanner or know a shop that has one, they will be able to use MULTI-1 connector to plug into the 5 pin block and read your codes.

Although this is old technology most any quality technician can read your codes for you. My experience is that when the check engine light comes on on those early models it's usually related to the EGR system in some way.

Good luck.

How do you turn the check engine light off on 2004 corolla?

Here a answer maybe CHECK THE ENGINE:) the light will go off

How do you reset a Mercedes E420 check engine light?

For my 1996 E320 I disconnected the battery for approximately 2-3 minutes. It worked. My wife had just recently filled the gas tank with bad gas that caused it too misfire.

Why is your check engine light on in your 1995 ford thunderbird?

The OBDII system in your vehicle has several sensors that monitor conditions and "report" to the system's computer. When a sensor senses a malfunction, a signal is sent to the computer and the Check Engine light will illuminate. To find the malfunction you have to have the sytem scanned by an OBDII scanner tool for the trouble code(s). AutoZone and similar auto supply stores offer free scans.

Honda Civic LX 2003 Check Engine light?

The check engine light is all because of the ECU has detected a problem with the emissions system. Have the ECU scanned with an OBD2 scan tool. This will retrieve the code that has been set by the computer. This code will tell you what part is being effected but not necessarily the defective part.

What would cause the GEN light to come on on a 1997 Dodge Ram 2500 Cummins Diesel?

The Alternator is not putting out enough voltage. If you recently replaced the alternator with a "new" remanufactured alternator that one could be bad to your truck somewhere to get it tested.

How to check 1998 Honda accord check engine light?

With a scan tool, or if you don't have one, see the FAQ in the "related links", question number 12.

Check engine light appeared?

Check with a professional. Expect them to charge between $50 and $80 to find out what caused it. Don't just turn it off.. it'll come back soon.

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

You will need to plug into the car's OBD II connector and scan vehicle's computer for codes.

Now, repair the problem that caused the light to come on, then clear the computer system.

If the repair is successful, the light will stay off. Otherwise, it will come back on again after some driving interval.

You can buy cheap code readers on eBay - they will give you the codes and reset the computer (turning off the check engine light). You can take the code and look it up on the internet to see what it means and find help for fixing problems. If the problem is not fixed, the light will come back on.

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Also, you could: "disconnect the negative battery connection. Press your brake pedal down for 10 seconds. Reattach your negative battery connection. The computer will be reset." It worked for me. After changing my spark plugs my check engine light was still on, then after doing this my check engine light went off.

Why won't your transmission shift when the check engine light comes on in your 99 Chrysler lhs?

In vehicles with an electronically controlled transmission, the computer will trip the "Check Engine" light when it detects a problem with the A/T. You have a transmission problem. Also, if the computer senses a serious problem with one of the main sensors, it may go into "Limp Home" mode where it uses calculated defaults instead of input from the sensors to control the engine. Check for trouble codes. On a 1999 LHS, with the car in off and in Park, turn the key on, off, on, off, and then on. Look at the odometer, the trouble codes should display there. Write them down then look them up on the net with a search engine or shop manual if you have one.

How long do I have to wait till the computer recognizes the change and the Check Engine light goes off after replacing a bad EGR Valve and EGR Solenoid Valve in my 98 Expedition?

Try disconnecting the battery for about 10 minutes to reset the code Went to Autozone to see if I replaced the wrong part. They said I had to wait "a while" till the change was recognized. That the computer used some type of formula of engine starts, miles, and gears shifted through before it would turn it off. It has been 3 days, about 8-12 engine starts and about 30 miles.

What causes the check gauges lights to come on in a 2002 Pontiac Sunfire?

I have a 1995 Pontiac Sunfire . The "check gages " light comes on when my gas tank is on empty. I dont know if this is a right answer but this is how I know I need to fill up at the gasbar .

The colour least deviated when he light passes through the prism?

Out of the visible colors, red.

The lower the wavelength the less it is dispersed.

How do you reset the check engine light on your 2008 suburban?

Disconnect the negative battery cable for 5 minutes. Note that the light will just come back on unless you repair the problem.

What is OBD code P0442?

This code indicates a 'small leak in evap system' . - Simplest and cheapest solution is usually fitting a new gas cap. If that doesn't do it look for a loose or broken small vacuum pipe in the engine bay. Also possible that evap canister is faulty.

As you don't give type and year of vehicle its very difficult to diagnose further.

What does P0410 OBD trouble code mean and how do you repair it?

The P0410 code refers to the emissions system. The AIR pump puts air to the exhaust to lower emissions. It takes in outside air and pumps it through two one-way check valves into each bank of the exhaust.

About 90% of the time that this code is set, the one-way check valves have worn out or failed and allowed water (which occurs naturally in the exhaust) back into the pump. In any cold climate, especially in climates with higher humidity, this water may be more excessive. The water partially fills the AIR pump, it can then freeze. When the PCM commands the pump on, if the pump is frozen it cannot turn, thus overloading the circuit and "popping" the fuse. Check the fuse first.

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