What parts need to be replaced for fault code P2178?

[StHenry]

Fault code P2178 requires replacement of front oxygen sensor, rear oxygen sensor, air filter and other components. Here is extended information: 1. P2178 fault code: The P2178 fault code indicates the system (air-fuel mixture) is too rich when leaving idle. Causes include faulty mass air flow sensor or manifold absolute pressure (MAP) sensor, excessively high fuel pressure, faulty fuel pressure regulator, injector malfunction, oxygen sensor failure, or issues with the electronic control module (PCM/ECM). It's recommended to visit a 4S shop for inspection before clearing the code. 2. Automotive fault codes: These are codes generated by the vehicle's ECU when analyzing malfunctions. Most fault codes indicate sensor failures or poor sensor performance, though some mechanical faults cannot be read by the ECU. 3. Engine malfunction: When engine problems occur, diagnostic tools will display fault codes enabling technicians to precisely locate faulty components for repair.