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The check engine light came on in my 2000 Pontiac sunfire and the code said that is was fuel emission not the gas cap what else could it be?
Wiki User
∙ 17y ago
Thats the $50,000 question. It is not easy diagnosing todays engine faults because sometime all you have is a code and it will not point directly to a certain device. Did you drive your vehicle at least 50 miles and a couple of days to see if the check engine light goes out now that you tightened the fuel cap? The computer will not automaticaly reset the check engine light if you tighten the cap. It has to go through a certain amount of miles and cycles so it knows the problem is fixed so don't be too fast to rush to another fix here. If it stays on I start with an O2 sensor since it has a lot to do with emissions. That is where I go and from there diagnose that to see if it is working properly. Best I can do for you now...............
Wiki User
∙ 17y ago
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What is the problem if the left turn signal blinks really fast on your 1999 Pontiac Sunfire and the check gauges light comes on frequently?
check the light bulbs to make sure theres nothing wrong with the bulb itself ie burnt out or intrenal short in the bulb. as for the check gauges lite it will come on when your gastank is low or if something is wrong
Resetting check engine light on Kia Sportage?
Repair the source, light will go out if that was the only problem. There are "monitors" or self tests the computer runs the car through a drive cycle, if a problem occurs, it may not run all of the self tests until that problem is taken care. Therefore, another problem may exist. It is emission related. OR hook up a scanner that is capable of clearing codes, and hope that none are still active. Disconnecting the battery can create other headaches and will not likely solve your dilemma. Best bet is to contact the local snap-on dealer and have him refer you to a known good shop that specializes in this technology-he will know. The " check engine light" is by far one of the most misunderstood technological advances by the public. This is an needed in-depth understanding for the public. It is a warning light that is illuminated when there is a problem affecting the EMISSION SYSTEM only. Emission system being the pollution control system. Don't get a hard on against it as it is a good thing once you understand it. One point that was brought up a a recent meeting of technicians was that the amount of hydrocarbons is greater when the gas cap is left off than when the engine is running. Hydrocarbons are part of pollution emitted as gasoline evaporates. Going a step farther, one facet of the emission system is the "Evaporative" portion. This is when the fumes from the gasoline are leaking from the system into the outside air. This is one part of the emission system that can trigger a check engine light. I would say that about 7% of the vehicles that have a check engine light are the result of a loose or inadequate gas cap. But understand that many scenarios are possible with the "check engine light" The vehicle's powertrain computer (note that some vehicles have 17 different computers) will run a series of self-tests. They will only run under certain criteria. And they can be vastly different from manufacturer to manufacturer. Some self-tests are not run until preceding ones have run successfully. So if there is a problem in one particular area that is preventing another self test from running, you can have a situation where one problem is fixed, but another still exists. If you fix a problem and drive the car through a drive cycle that sets the monitor (or self test) the light will go off as it passes that criteria that triggered it in the first place. After 1996, the auto industry went to a idea called OBD II (on board diagnostics). This was to get all the manufacturers onto a similar plane for troubleshooting and powertrain control. While they still differ vastly, many corrections and adaptations were made for technicians to better fix the check engine light problems. Prior to this there were so many different and poor troubleshooting data from a check engine light problem that resolving the problem was much more difficult. Many early warning light of this nature were set to illuminate based on mileage. An Oxygen sensor was one of the things that were meant to be replaced when that mileage was hit. This is much like many current "Change oil lights
How do you reset check engine light on 2003 4.3 blazer?
The check engine light is illuminated for a reason. One of the engine control devices has probably ceased functioning. Take the vehicle to a shop for diagnosis, and repair of the problem.
How long after you reset the check engine light do the codes clear in your cars computer?
pretty much instantly. As soon as the codes are cleared the check engine light goes off and vice versa, unless there still is trouble. In this case the codes won't clear until the trouble is repaired.
How do you reset the check engine light on 1993 Subaru Justy?
After repairing the cause of the code, you can clear it with a scan tool.
What is the check engine code P0442 for the Pontiac Sunfire?
P0442 Code indicates Evaporative Emission System Leak detected (small leak). What are the causes? What components need to be repaired
Why does the check engine light flash on a 2003 Pontiac Sunfire?
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How do you fix horn in 1998 Pontiac Sunfire?
how to check fuse for horn in a 1998 Pontiac sunfire
How do you check your engine code with the ignition key on a 2002 Pontiac Sunfire?
cant you need a scanner to check codes from 1996 and newer
Check engine light on a 1998 Pontiac sunfire?
it probably needs an O2 sensor they range from about 40-90 dollars
Where is the thermostat located on a 1998 Pontiac Sunfire?
check this site------>
What is the fix Pontiac sunfire 1997 check engine code p0342?
camshaft sensor - signal low could be that or check the wiring to it. Other possibilities MAF or TPS
What could be the cause of a clicking noise in the engine of a 2002 Pontiac Sunfire?
check if your battery is low than usual ..might be alternator problem
How many mpg of gas does a 2003 Pontiac sunfire get?
You mileage will vary dependent on the condition of your car, your driving habits and which engine/transmission you have. Check the web site below for exact specs. http://consumerguideauto.howstuffworks.com/1995-to-2005-pontiac-sunfire-6.htm
Where is the fuse for the heater located to on a 99 Pontiac sunfire?
check the owners manual
How do you get the reverse lights working on a 2002 Pontiac sunfire 2.2L?
Check the bulbs, check the fuse then check the switch.
Why does the check gage light come on in a 2001 Pontiac sunfire?
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.
