0
I'm not sure what is checked during a smog check.
In the UK we have an emissions test.
If the vehicle (petrol engined) has a miss fire it will bring the carbon monoxide level down.
But in doing so The hydrocarbon level will rise.
That will cause a test failure
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Will a bad egr cause smog test fail?
yes it suppose to circulate the smoke if clogged smog test will fail
What can make a car not pass a smog check?
The answer to this question is fairly complex. We recommend you visit the link below to find out how to pass the smog check and what might cause your vehicle to fail... http://www.smogtips.com/passing_inspection.cfm
Will a bad catalytic converter cause you to fail the emissions portion of the smog test?
Yes!
Your 98 Chevy s10 fails smog test have replaced everything but egr valve and oxygen sensor what else can you do?
A faulty EGR valve can cause a 98 Chevy to fail a smog test. The oxygen sensors should also be tested as they can also cause a 98 Chevy to fail a smog test.
Can you remove smog pump 1995 Chevy caprice?
Yes, but you have to have the PCM programmed for the removal. You might fail visual portion of a smog check, however.
What can cause a 1999 Saturn SC2 to fail the smog test after the battery was replaced?
Have it scanned to determine problem
My 97 ram 1500 reads error code 441 evaporative canister will this cause it to fail the smog test?
It depends on where you live. If you live in a state that requires smog tests, yes, it will cause the vehicle to fail. The test includes verification of the status of the emissions diagnostic codes. In other words, if your car throws a code it won't pass.
What would cause the Check engine light to came on after smog check?
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.
The cause of smog and acid rain?
the burning of fossil fuels can cause smog and acid rain
Can a defected charcoal canister cause engine misfire or smog test failure?
yes it can cause smog test failure, check engine light will most likely pop up since it controls part of the vapor by filtering it.
When should the oxygen sensor be changed on a Grand Am?
Every 60,000 miles, though some can last longer before failing enough to cause you to fail smog.
Will you fail smog in California if serice engine light is on?
Yes, automatically.
