Pathfinder engine jerking

Dude, I had almost the EXACT same thing happen with my Pathfinder! The jerking on acceleration and the check engine light...sounds familiar. Did you check for any exhaust leaks? That can mess with your oxygen sensor readings and cause all sorts of havoc with the engine's air/fuel mixture. An oxygen sensor measures the amount of oxygen in the exhaust gases, and the engine control unit (ECU) uses this information to adjust the fuel mixture. What error codes are you getting?

Interesting! An exhaust leak, huh? I hadn't really considered that. Which part of the exhaust system should I be looking at specifically? Also, the error codes were pointing towards something like a general misfire and maybe something related to the fuel trim. Could a small exhaust leak really cause those kinds of problems?

Yeah man, even a small leak can throw things off. I'd check around the exhaust manifold first, and then along the pipes, especially near any joints or welds. Misfires and fuel trim issues can totally be caused by the O2 sensor getting bad readings because of the leak. Honestly, diagnosing exhaust leaks can be a pain. I just took mine to the shop, and they found it pretty quick with a smoke test. Probably worth it to save yourself the hassle.

Thanks for the tip! I took it to my mechanic, and you were spot on. Turns out there was a small crack in the exhaust manifold. They welded it up, replaced a gasket, and the total came to about 265€. The engine is running smooth as butter now! Really appreciate the help!