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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 causes the Check Oil light to come on and the oil pressure to drop when the engine warms up on a 1993 Pontiac Grand Am?

If the main and/or rod bearings are worn, the oil pressure can't be maintained after the oil warms up and thins out. You might be able to get a little more life out of the engine by switching to a heavier weight engine oil.

It is possible also that just the oil pump has worn and can't produce enough pressure at idle. Very often, though, if the pump is worn, so are the bearings, and vice-versa.

You recently took your car in for a tune up transmission service your transmission was leaking a week later the engine light came on and wouldn't shift out of second after it was fixed whats wrong?

If they worked on the transmission there should a warranty period.
Call them, then take it back and make them fix it. Good Luck and Remember.
Change Your Mind, Not Your Oil.
Use the First In Synthetic Motor Oil's.
See My Bio For more information. If the transmission is leaking and it won't shift, try checking the transmission pan and filter. They might not have replaced the gasket or filter.

Why does your 88 RX7 idle obscenely high...like 5200 RPM?

When this happens its usually when there is air getting in to the engine when there shouldn't be

try to look in these areas...

possible vacuum leak - to idle that high it would have to be a very big vacuum leak

throttle plates sticking - not likely but does happen. you will have to take off the inlet ducting to varify that they a closing properly.

check ov the intake system to check that air can not get into the engine any other way other than through the throttle body.

after this check if there are any error codes.

check fuel pressure - shouldn't be higher than 50 psi.

if that doesnt shed some light on the situation hook a boost gauge up temporarily and see what the engine is doing - then give it a little rev see what the gauge does and then work from there.

hope this helps.

AnswerWhen this happens its usually when there is air getting in to the engine when there shouldn't be

try to look in these areas...

possible vacuum leak - to idle that high it would have to be a very big vacuum leak

throttle plates sticking - not likely but does happen. you will have to take off the inlet ducting to varify that they a closing properly.

check ov the intake system to check that air can not get into the engine any other way other than through the throttle body.

after this check if there are any error codes.

check fuel pressure - shouldn't be higher than 50 psi.

if that doesnt shed some light on the situation hook a boost gauge up temporarily and see what the engine is doing - then give it a little rev see what the gauge does and then work from there.

hope this helps.

BEST ANSWER

When all vacuum leaks have be addressed and fixed.(COLD START SCREW "BETWEEN THE TPS AND IDLE SCREW" - JUST TAKE IT UP JUST UNTIL IT DECIDES TO NO LONGER ADJUST, THEN SCREW IT 1/16 OF A TURN AND LOCK IT DOWN).

Now it's time to baseline your Idle (make sure car is at operating temperature)

1. On top of the upper intake, there is a screw which is your idle adjustment screw. Screw it to the right until it can't go anymore(DO NOT TIGHTEN)

2. Adjust your TPS to the left as well (Just to the point where you no longer see it adjusting and then screw it to the right 1 - 1-1/4 turn.)

3. Start your car and if it drops and dies, adjust the idle speed screw to the left a little at a time.

Repeat step 3 until it finally fires up and stays on. Look at your tach and set it to 750 - 1000. I set mine at 1000 bencause it's smooth and i have a good throttle response at that but you set where you feel comfortable.

What is the proper fuel mixture for a McCulloch Mac Cat 38cc chainsaw engine?

40:1 with high quality 2-stroke oil mix would be fine.

http://store.chainsawr.com/

Why does the check gages light on your 1994 silverado come on and the oil presure gauge is going up and down?

the oil presser going up and down is why your check guadges light is coming on.. probly need a ned oil pump but check the sender first, much easer and cheeper to replace..

What makes your coolant light come on when you step on the gas?

Low engine coolant--when you step on the gas water pump runs faster and is calling for more coolant--check level

What should you do if your 2002 Silverado is misfiring and the Check Engine light is on after using a bottle of fuel system cleaner?

Take it to Auto Zone and have the codes downloaded and read.

AnswerIf you download the codes (as above states) and they are too cryptic to decipher, then:

Could be any or all of the following:

Fuel pump - not working at full capacity

Fuel lines - restricted somewhere

Injectors - clogged ( or still clogged in your case)

Connect a fuel pressure gauge to the fuel line just before the throttle body and see if you are getting enough pressure (15psi). If not, then your fuel lines should be inspected and if they are OK (which is probably the case) then the fuel pump should be replaced. If the pressure is good then you most likely have a problem with the injectors. These can be replaced at a cost of a few hundred dollars or so.

also if you have the avability of the a tech 2 after checking the fuel system first to check the injectors you want to prefrom what is called an injector balance test, which will test each injector for it proper function. But normally if you have a misfire use the tech 2 and look at engine misfire this will tell you which cylinders are misfiring check the plug wires with a approved spark tester and then you might want to pull the plug and visually inspect it also

check your fuel pressure regulator 1st then injectors, independent ingnition koils, then your fuel pump( the fuel stst. cleaner could have knocked a piece of carbon lose in your injectors and is npw cloging it. O yeah check your pcm

I had my engine swapped and got the same code reading. So we put in some high octane race fuel to clean out the engine. And yes it did work!

What should you check for a P260F Diagnostic code?

This is a powertrain code that signals an evaporation system monitor performance issue.

What does check engine light mean on a 2002 ford explorer sport trac?

The check engine light comes on when the engine computer has detected a malfunction and set a trouble code.

Why does my check engine light blink on and off on my ford f-150?

The computer illuminates the "check engine" light when it detects a condition needing attention, such as a faulty sensor. The computer will FLASH the check engine light when the condition is significant and should be addressed immediately.

You can purchase, rent or borrow a computer code scanner at most auto parts retailers such as Checker Auto Parts or Auto Zone.

Why does the check engine light flash on a 2003 Pontiac Sunfire?

If a check engine light is flashing that means an engine cylinder misfire has

been detected

How do you reset the Service Engine Soon light on a 2005 Buick Rendevious?

You will need a OBD2 reader to reset it. They can be obtained for less than $50 at most auto stores. Alternatively some auto parts stores will read and reset the codes for you free.

Can you turn back light skinned if you turn light brown and you a black person?

There is a disease/condition called "vitiligo" that usually shows up as a patchy loss of pigmentation.

If that's not what you're talking about, I don't understand the question. As nearly as I can figure out, you're claiming to be a "light skinned black person" who "turned light brown", which doesn't make a great deal of sense to me.

What oes lest too light winning make the prize light mean?

It means, we value the things we have to work for far more than we value things that are just given to us. If something is very easy to get, we don't give it the same value we give things that we work very hard to achieve.

How do you reset the service engine light on a 1996 grand prix after battery change?

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.

What does it mean when the car shakes and you start to smell something burning and check engine light comes on?

It is an engine misfire!

Its caused by a one or more cylinders misfire due to either spark plug, spark plug coil, fuel injectors or fuel control system.

Most likely though - it is a spark plug related.

As for the smell - Catalytic converter (CAT) is flooded with lots of raw fuel and gets really hot while burning it.

Bring your car to closest garage immediately and ask them to check scan codes. This will determine which cylinder therefore plug to replace.

Drive slow, don't rev your engine!

How do you reset a check engine light in a 1999 ford escort zx2?

take the terminal + off your battery hold it to the - terminal for about 15 seconds it will go away but probably come back depending on what is wrong .if you take it to your local autozone they will hook it to a computer for free and tell you why it is on

How do you correct code p1682?

P1682 A/T FI Signal A High Input (Acura, Honda)P1682 Charging System Voltage Too Low (Chrysler, Jeep)

How does one reset the check engine light in a 99 Mitsubishi Galant?

Go to auto zone and have the codes read for free.

To reset, the easiest way is to remove the negative battery cable for a couple of minutes then reconnect. This will clear the error codes from the car's computer. If everything is okay, the CHECK ENGINE light will stay off.

Remove the light bulb.

OR

Step 1. Locate your vehicle's battery. Disconnect the 12v positive cable (red wire) from battery terminal (+). Leave it disconnect for 5 minutes. While the battery is disconnected, cycle the ignition switch to ON position 3 times.

  • You've just erased important emissions related data which is invaluable to a smog technician attempting to repair your vehicle.
  • You also deleted very important "readiness flag" data which takes days, if not weeks to compile.

Step 2. Insure ignition switch is OFF. Reconnect the battery 12v positive cable (red wire) to battery terminal (+).

  • You're risking electronic component damage. High voltage spark produced during the reconnection of the positive 12v cable can cause damage to fragile electronic emissions component/s.

Step 3. Cycle ignition switch to ON position and wait 1 minute, then start your vehicle. Check Engine Light or Service Engine Soon Light should be reset and turned OFF.

  • If you are successful in turning off the check engine light, this means your vehicle has not stored it's emissions data in the ROM section of it's computer and you have just deleted all data pertaining to your vehicle's engine and emissions systems, probably including your radio & system settings.

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