P0173Fuel Trim Malfunction (Bank 2)

The engine computer adjusts how much fuel it adds based on readings from the oxygen sensors. This code means the correction needed on bank 2 (the engine side that does not contain cylinder #1) has gone too far in one direction. In practice the mixture is too rich or too lean and the computer can no longer compensate within its normal range.

Ամենատարածված պատճառներն են՝ Vacuum or intake air leak (unmetered air), Failing or dirty mass airflow (MAF) sensor, Faulty oxygen sensor on bank 2, Fuel delivery problem (weak fuel pump, low pressure, clogged or leaking injectors), Clogged or dirty fuel filter, Exhaust leak near the oxygen sensor, Vacuum leak from PCV system or hoses։

Սովորաբար անվտանգ է կարճ տարածությունների վրա վարել, սակայն շուտով ստուգել տվեք։

Have the live fuel-trim data read to see whether the system is running rich or lean, which narrows the cause quickly. Check for vacuum leaks and inspect the MAF sensor and fuel pressure before replacing parts. It is generally fine to keep driving short trips, but fix it soon to avoid wasted fuel and possible catalytic converter wear.