An increase in exhaust emissions could indicate a few different problems. It’s possible there’s an issue with your truck’s engine that’s causing it to burn fuel less efficiently. This could be due to a variety of factors, from worn-out spark plugs to a clogged air filter. Another possibility is that there’s a problem with your exhaust system itself. A leak or blockage in the exhaust system can cause emissions to increase.
It’s also worth checking if your truck is using the right type of fuel, as using low-quality fuel can lead to more emissions.
I would recommend getting your truck inspected by a professional mechanic who can identify the exact cause and suggest the necessary repairs.
Remember, regular maintenance is key to keeping emissions low.