Check Engine Light

Evaporative Emission Control System Malfunction This indicates that a part of the EVAP control system is no longer fuctioning correctly. The EVAP system consists of many parts, including (but not limited to) the gas cap, fuel lines

, carbon canister, purge valve, and other hoses. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine

.

You start by having it checked for codes. The light comes on because the computer has detected a fault. You need to know the code to know what to repair.

It might be that you did not tighten the gas cap enough.

When a check engine light appears on a 1991 Honda Accord the ECU is letting the driver know the engine is sending an error signal. Sourcing out the problem through a diagnostics test will help narrow what could be something as simple as a blown fuse to something as terrible as a blown engine.

you can disconnect the negative cable at the battery for at least 30 seconds. if the problem is intermittent, the light will be out afterwards. if it comes right back on, seek a shop that does engine diag.

By fixing the problem that illuminated it. Get the codes read and fix the problem from there.

disconnect the battery for five minutes, It will reset

This sounds to me like one of the sensors could be giving you a problem. The areas I would look at are the throttle cable, and check the sensor connections one may be loose, with the choke light coming on that would point to the throttle cable or the idle. Check out the articles at Auto Tap they are pretty good on this area. There are several DIY aticles if you go back to the homepage, I put the link for the Check Engine Light below

Reset the Check Engine Light by disconnecting the battery for about 10 minutes.

with a scan tool on some cars you can disconnect the battery a few minutes and the computer resets

Upon further invesigation I withdraw my answer (below). Apparently 1996 and newer cars have and OBD2 Computer, which means you have to pay a lot more to get the code. Sorry if I threw anybody off prevously.

[The easiest way I have found is to turn the ignition on and off three times (on, off, on, off, on). When you do this, the check engine light will flash the trouble code (ie. blink-blink-blink..pause..blink-blink = 32). If you have a repair manual, the codes should be listed in there. I have done this with every car I've owned it's way cheaper than spending the money on a scan tool that will tell you the same thing.]

Check that catalytic converter is not plugged

well i know my focus service engine light was on and we just unhooked the battery for 20 seconds and now the light is off and it has been 1 month

I have an 01 Pontiac sunfire and I have noticed that the check gages light comes on when the gas is low. I have never seen any other indicator come on for low fuel.

It is important to know the causes behind warning lights showing up on a car. The check engine light comes on after a certain speed because there is a problem with fuel, electricity, or oil of the engine after that speed, that is causing issues.

Ask the guys at Auto Zone. They likely have the codes.

P0455 requires two failures in a row to turn the light on. Pending means that it has failed the large leak test once. Treat it like an active code.

P0455 evaporative emissions large leak.

You need to take your truck into a repair shop so they can read the code on their reader. You do not want to drive your vehicle with the check engine light on without knowing what the problem is. The lights are on because there is a problem; they should go off once the problems are fixed.

The flashing engine light indicates a severe engine trouble code, for example constant engine misfire. If you pull the code with a reader, you will most likely pull up misfire on at least one cylinder.

To reset the check engine light you must have an OBDII code reader with the reset function. The underlying fault that caused the light to turn on must be fixed or the light will turn on again once the condition is detected.

The light will be reset if the battery is disconnected for about 10 minutes but will turn on again if the fault that caused the light to turn on is not fixed. Also, the engine will not run at its best until the computer is retrained.

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.

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.

The code can only be reset by an OBD II scan tool, available at any auto parts store or local repair shop. many auto parts stores will read the codes for you and reset the light for free, Auto-Zone comes to mind. Of course, what ever is causing the light to come on will set it again in about a day. The cause must be repaired...

EGR stands for Exhaust Gas Recirculation. The EGR valve feeds exhaust gas back into the engine to cool the air fuel mixture and reduce NOx emissions. NOx is formed at high combustion temperatures and is responsible for smog.

However, engines don't run well when they're fed exhaust gas instead of air and fuel. So car makers only feed exhaust when the engine is running at higher RPMs. At low RPMs (idle), EGR can cause a rough idle or even cause the engine to die. An EGR valve that doesn't close all the way will leak exhaust into the intake manifold all the time and cause all kinds of problems.

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.

EGR closed position performance.

After warmup, engine RPM should never fall below 2.0 bars. Check if oil pressure decreases at the same time engine temperature increases. Engine overheating will cause any oil to get thinner and lose viscosity. This results in lowered oil pressure even when the oil LEVEL is normal. I that is the case, check for cause of overheating. older and/or abused engines may overheat because of power loss due to poor compression and/or other reasons.