I have a 2016 mazda cx-5 with 25K miles that has to go through a yearly inspection. The vehicle's in good shape, plus I take it the mazda dealer for maintenance.
I took it to the the inspection center last week. This is how they inspect: They place the gas analyzer into the tailpipe and then hook up the computer. During the inspection the guy tells me to accelerate to about 2500 rpm for a few seconds with the A/C off. During this part of the inspection, the HC-PPM went up to 160. The limit’s 100 so I failed.
I'm not a mechanic, but is there anything I can check or clean?
The car doesn’t have any issues and I even changed the oil two months ago at an authorized mazda dealer.
A friend told me that the issue could be that there's a malfunctioning sensor that's incorrectly "telling" the car how much exhaust gas it has to release when burning gasoline.