Unlocking Engine Performance The Ultimate Guide to Code P0171

The P0171 code is linked to your car having clogged fuel injectors, implying the engine controller is sensing a lean state. If the injector is ... That's a lean code. Any unmetered air that gets in the system can cause that as well as low fuel pressure. If your canister hose was loose ... The surging rpms sound like the plastic hose from the intake to the turbo has a vacuum leak. Check both ends for fitness and take a good look at the hose. P0171 means a fuel system running lean on Bank 1. Our expert mobile mechanics can diagnose and fix your P0171 trouble code wherever you are. I was able to get enough gas to get to a decent gas station to fill the tank. On my way home I got a check engine light and the code was P0171( ... Maf looks ok, since positive fuel trims decrease at higher rpm suspect vacuum leak. Lots of info out there on locating vacuum leaks. Try water spray bottle ... A dirty or faulty MAF sensor can send incorrect information to the ECM, causing the engine to run lean and trigger the P0171 code. Faulty Fuel ... Is your valve cover leaking? If so could be spilling oil on the O2 sensor. If it's leaking, you probably have a bad PCV valve as well. Based on the information you provided, it seems like your vehicle is displaying a P0171 error code, which typically indicates a problem with the ... PCM & Fuel Systems - Engine Code P0171 - #P0171- According to the book it means System adaptive feul too lean (bank 1) .