P0172 System Too Rich Solution?
2 Answers
P0172 system too rich treatment method: Check the atomization condition of the fuel injector; test the electronic control system; check whether the engine intake pressure sensor has a fault; check whether the intake pipe is leaking. The following is a related introduction about automobile fault codes: 1. Meaning: Automobile fault codes are the fault codes reflected by the car's computer ECU after a fault occurs. Generally, common fault codes are caused by sensor faults or poor sensor performance, but some mechanical faults cannot be read by the ECU. There will be some basic fault displays on the car dashboard, but that is only a small part. The main part still needs to be read with the help of an instrument - a decoder. There are many types of decoders, such as X-431 and KT300, but the working principles and the fault codes read are the same. 2. Classification: Fault codes are divided into real codes, historical codes, and intermittent codes. Real codes are easy to detect, historical codes, as the name implies, are previously unresolved fault codes that have not been cleared, but intermittent fault codes are not fixed.
I encountered the P0172 issue, and the system running too rich was really a headache, with the car's fuel consumption skyrocketing and acceleration feeling weak. For the solution, I think starting simple is best—first check the mass airflow sensor; if it's dirty, just clean it with a specialized cleaner. Then check for vacuum hose leaks by applying soapy water to the connections and looking for bubbles. That's how I fixed my car last time—it was cost-effective and worked. The engine computer might be incorrectly adjusting the fuel ratio, causing it to inject too much fuel and run rich, possibly due to a faulty oxygen sensor that needs replacing. Regularly cleaning the intake system can prevent this. Safety first—don't delay, or the catalytic converter could get damaged, leading to higher costs. Now, I've made it a habit to do a simple check every month, and the car's condition is much more stable. Friends who tried it said it works wonders.
