The " check engine light" is by far one of the most misunderstood technological advances by the public. I am sure I will revise this as time goes on, as it is an in-depth understanding for the public. It is a warning light that is illuminated when there is a problem with 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
Yes, may read service engine soon, check engine, .....
Why parkinf light is on 2000 nissan pathfinder even engine is off.
Repair the problem then use an OBD2 scan tool to reset the light.
maybe your speed sensor is bad you will get a check engine light on the dashboard too.
There are several reasons why a service engine light comes on in a 2005 Nissan Pathfinder. A few reasons could be a loose gas cap or the fuel sensor.
A service engine soon light on a Nissan Pathfinder can mean many things. There could be a bad spark plug or even an engine malfunction. A mechanic can run a diagnostic check to see what the problem is.
Check your brake fluid level, probably low,.............
If the check engine light is flashing it indicates that a cylinder misfire has been detected.
The light comes on when the computer senses a problem. You have to check what code is stored in the computer and go from there. Some auto parts stores will check the code free for you.
the check engine light is blinking and my 03 Nissan exterra is running rough
How do you replace a broken tail light cover for a 2005 Nissan Pathfinder ?
To reset the ABS light on a 1995 Nissan Pathfinder, disconnect the battery for 10 minutes. A Nissan dealer can also reset the light with a computer.