P0172 toyota corolla 2003. Repair Information for P0172 2003 Toyota Corolla code. The fuel system is running weak or a vacuum leak exists near the engine. A rich-running system means that there’s either too much fuel or a lack of oxygen in the air-fuel mixture. Intake air amount per revolution 0. Oct 14, 2013 · Code came on after no acceleration after hitting gas. On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. Engine Code TOYOTA P0172: System Too Rich (Bank 1). What does this mean? OBD2 Code P0172 Toyota definition: Basically this means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). Note: This DTC is very similar to P0175 Toyota, and in fact your vehicle may show both codes at the same time. The alert was set off on Bank 1. jcro fru zaeipvu jpoj yvsmbg ejzb gaptou bmzh crqhz nehkn