What happens when you fail an emissions test?
Here are some examples of what a technician might find during troubleshooting: Problems with either the engine or transmission can lead to an increase in tailpipe emissions, as well as an illuminated “Check Engine” light. The end result is a failed emissions test. Modern cars have an array of emissions equipment onboard.
What happens when a car fails the NOx test?
The car has failed the NOX portion of its emissions test. This is probably the most common failure I’ve seen, but that term on the emission test seems to scare people. But it is usually an easy failure to fix. The following description may seem to go against logic at first, but it does explain what is actually happening to make your car fail.
How does an emissions test work on a car?
Those ugly contaminants work their way through the crankcase ventilation system, back into the combustion chamber, out through the exhaust pipe, and then right into the machine conducting the emissions test. So if your car is nearing its next tune up and emissions test at the same time, simply have the tune up and oil change done first.
What should I do before my emissions test?
Before getting your car tested, drive for at least 20 minutes to warm it up. You should also schedule an appointment with the testing center so that you can be accommodated while your engine is still warm. Doing so will help ensure both the engine and catalytic converter are at the optimum temperature for testing.
What makes a car fail an emissions test?
Newer cars have a computer, called the Power Train Control Module (PCM), to precisely meter the gasoline to the incoming air flow. It does so by electronically activating and then constantly fine tuning the fuel injectors. Either way, an out-of-whack fuel injection system, or engine management system as we refer to them, is the culprit.
The car has failed the NOX portion of its emissions test. This is probably the most common failure I’ve seen, but that term on the emission test seems to scare people. But it is usually an easy failure to fix. The following description may seem to go against logic at first, but it does explain what is actually happening to make your car fail.
Are there any problems with the 2012 Jeep Wrangler?
The guys at the inspection station told me they just received a memo literally this week about the 2012 Wranglers and a problem with the fuel system monitor. Apparently there’s a list somewhere of a bunch of cars and the problems they experience when going through inspection and the 2012 Wrangler was just added to this list.
Why does the Check Engine light not illuminate?
The check engine light/ MIL may not illuminate if the catalyst is only beginning to clog, so don’t think the catalyst can’t be clogged if you have reduced power but the light doesn’t illuminate. A clogged cat can trigger the check engine light – and that will cause you to fail an emissions test in most locations.