obd2 · obd2/P0172
P0172
System Too Rich (Bank 1)
The fuel trim on bank 1 is removing fuel to compensate for a rich air-fuel mixture. Common causes include a leaking fuel injector, high fuel pressure, or a failing MAF or O2 sensor.
The fuel trim on bank 1 is removing fuel to compensate for a rich air-fuel mixture. Common causes include a leaking fuel injector, high fuel pressure, or a failing MAF or O2 sensor.