What is the solution for the Buick P0172 system running too rich?

[LaMartin]

Buick P0172 system running too rich can be resolved by: 1. Abnormal fuel filter pressure: Replace the fuel filter; 2. High-pressure pump leakage or abnormal fuel injector flow: Professional inspection and repair can be done at a 4S shop; 3. Check if the spark plugs, ignition wires, intake manifold pressure sensor, and throttle are functioning normally; 4. Check if the fuel pressure is too high, if the temperature sensor is providing accurate readings, and if the oxygen sensor voltage is normal. Taking the Buick 2021 New Excelle GT 1.5L Automatic Pioneer Edition as an example: The car's dimensions are 4609mm in length, 1798mm in width, 1464mm in height, with a wheelbase of 2640mm. The manufacturer of this car is SAIC-GM Buick, classified as a compact car, with a naturally aspirated intake form, a maximum horsepower of 113ps, and a maximum torque of 141nm.