Jun 6, 2018 · I've had this P2188 code once and similar symptoms. Bought the HPFP, cam follower, new plugs and oil, still need to install. The cause of rough running, hard starting and stuttering — the HPFP seal and or HPFP itself leaks gas into the engine after shut off causing the rich running condition. Jun 23, 2018 · Burnt Odor Coming from Engine. Another common CVT issue in Audi cars is overheating and fluid leaks, both of which can cause a burning smell to emanate from the car. When the transmission fluid leaks into the exhaust, it can cause serious issues and should be repaired immediately to avoid further damage. 2011 Audi A4 having problems starting, when I press the brake and push the key in, engine doesn't turn at all but lights/radio/etc all go on. Did diagnostic at repair shop to make sure it wasn't th Replacing the bad PCV on my 2011 Audi A4, because it was running Rough at idle. Also throwing a fault code for bank 1 running too lean at idle. When I replac LBDNR.