Why did my 4Runner fail a smog test?
Two weeks ago I went to a California smog test station, and they said my 5-speed ’97 2wd 4Runner with 150k miles (with original cats and oxygen sensors) would fail because the catalytic converter monitor wasn’t ready.
Why did my car fail the smog test?
In other words, in most cases, when an emission monitor setting problem has been identified by BAR or CARB, the smog machine is already programmed to bypass the testing of said monitor.
How long does it take to complete a diesel smog test?
Any two (2) monitors may be incomplete on 2007 and newer diesels. Some tests only run when the car sits overnight, or is allowed to cool down for several hours. Most cars will complete the monitors easily with the above methods, but rarely it will take up to several weeks before they are complete.
Can a DTC erase a smog check monitor?
If your car has recently been repaired for a problem that set a DTC (check engine on) and the technician cleared the DTC, he also erased the monitors. Also, if battery has been disconnected, replaced or needed a jump-start, the monitors may be erased.
What happens when your car fails a smog test?
When your car gets a smog test, one portion of the test involves connecting the smog test machine to the car’s computer and checking if there are any DTC’s, and also checking to see if the monitors are ready. If they are not, the vehicle fails the test, because there may be problems in the system that can’t be reported by the computer.
If your car has recently been repaired for a problem that set a DTC (check engine on) and the technician cleared the DTC, he also erased the monitors. Also, if battery has been disconnected, replaced or needed a jump-start, the monitors may be erased.
Any two (2) monitors may be incomplete on 2007 and newer diesels. Some tests only run when the car sits overnight, or is allowed to cool down for several hours. Most cars will complete the monitors easily with the above methods, but rarely it will take up to several weeks before they are complete.
Can a car pass with only one smog monitor?
Note that a car can pass with some incomplete monitors…a maximum of one on 1999 and earlier cars, and only one ( The Evaporative System monitor) on model year 2000 and later gasoline powered automobiles. All monitors must be complete on 1998-2006 diesel powered vehicles.