Question about 2000 Pontiac Grand Am GT
Service Engine Soon light is on.
What I did: replace burnt out light bulbs except 1 in dash for fan speed. Left (Driver's side) front daytime running head light not as bright as right side.
When car warms up Engine gets loud when idling. Sounds like a turbo but doesn't have one.
Clunking noise from front drivers side suspension (by wheel) when turning wheel right and backing up.
Brakes at calibers squeak when applying brake completely.
What I did: greased the pad clips and temporally went away but came back.
Thanks Dave G
The since the service light keeps comming on take the car to a chain autoparts store like Autozone. They will scan your car for free. Find out which error code the computer is displaying and this will tell you where the issue is.
As far as the brakes squeeking check and make sure the calipers are not loose. They could either be loose at the allen bolts or the rubber impact fillers could be warn out causing the calipers to move a little even though the bolts are tight. This will also cause a clunking noise when you hit bumps while driving.
Does your car pull to the right or left when driving straight? If so you may also need an alignment.
Let me know if you have any other questions.
Thanks - Tech101
Posted on Jun 26, 2008
What causes the check engine light to come on for a while and then go off?
Intermittant problem. 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 ******* 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� that are set based on a pre-set mileage.
Posted on Jun 26, 2008
Posted on Jun 26, 2008
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Posted on Jan 02, 2017
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