If the cause of this issue is still not found after the mechanic has performed these two tests, the problem likely lies with a sensor. The cause of this trouble code will likely be discovered during one of these two tests. In order to maintain a proper air/fuel ratio, the vacuum and fuel pressure of the engine must be within the manufacturer’s specifications. The fuel pressure sensor and MAF sensor (mass air flow) will also be checked with a fuel pressure gauge. A vacuum leak will create a hissing sound usually only audible when the engine is turned off. How does a mechanic diagnose the P0171 code?Īssuming that no other trouble codes exist, a mechanic may diagnose the P0171 code by checking the engine for vacuum leaks with a vacuum gauge. Catalytic converter damage may result if this code is stored for a long period of time.A lean condition occurs when the engine either receives too little fuel or too much air. The P0171 OBD-II code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. System Too Lean (Bank 1) What the P0171 code means
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |