quick google search: About the NJ Vehicle Inspection Program
New Jersey uses the On-Board Diagnostics (OBD) Test during the emissions inspection. OBD tests connect your vehicle to a computer system that checks for engine-related problems that could increase harmful emissions into the air. Your emissions inspection results are based on these findings.
if ANY codes are set (like Check Engine light) = Fail
BTW, does NJ actually test diesel powered vehicles? Maryland does not. Ummm, just looked it up. It says that these vehicles are exempt: "Diesel-fueled motor vehicles having a GVWR of 10,000 pounds or more that are required to be inspected by the owner or lessee". So I am assuming your car DOES have to got to inspections.
I havent had a car inspected in NJ in many years.
When you buy a brand new car, the inspection sticker is good for 5 years. (the car I'm looking at is in Pa)
Wifes last car was an 08, and we traded it in on a 12, so I'm not due until 2017 if we dont sell/trade it in before then.
My vehicle is a diesel pu truck. They stopped inspecting "trucks over 5000 lbs" a few years back. It's now "self inspection".
Before that, they didnt even hook up the OBD as far as I know.
Wouldn't matter much, mine is mechanical. There's virtually no engine electronics other than the gauges, a solenoid on the fuel pump, the starter and alternator. There is a "brain" but all it runs is the above few items and probably the ABS.
It used to have a cat, but that was the first thing I removed after leaving the dealer.
Inspection never even looked I guess, because I passed every year.
~so, I'm a bit outta touch on the NJ inspection stuff.
Thanks for the quick answers.