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P0172

The fuel filter (https://www.yourmechanic.com/services/fuel-filter-replacement) for your car is in the fuel tank. If you want to replace it, you will need to replace the fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement). It isn't regularly serviceable item anymore. As for the codes, the P0172 (https://www.yourmechanic.com/article/p0172-obd-ii-trouble-code-system-too-rich-bank-1-by-blake-griffin)...

P0172 (https://www.yourmechanic.com/article/p0172-obd-ii-trouble-code-system-too-rich-bank-1-by-blake-griffin) means too much fuel or, conversely, too little air, is being supplied and thus the air fuel ratio is sub-optimal. Other causes of this code setting, that are not reflected in your list, include a dirty mass air...

Hi there. As you already know, replacing components without diagnoses, can be expensive and time consuming without resolution. The P0172 code (https://www.yourmechanic.com/article/p0172-obd-ii-trouble-code-system-too-rich-bank-1-by-blake-griffin) is an indication of too much fuel or not enough air is being delivered to the engine. The...

Hi there. If this vehicle is having an idle concern, I have to ask if you may be having a stumble or stall issue when coming to a stop. If so, your vehicle may be covered under a special service...

I would have to say do not replace the O2 sensors since they are just telling you the system is rich and they see it. You should have the Mass Airflow Sensor and any inlet tubes checked for leaks. Clean...

Hello, thank you for writing in. There is one major issue that is likely causing everything else you are experiencing. This is your fuel system. You need to start by checking and/or replacing your fuel pump. When it gets low,...

The P0304 code indicates a misfire has been detected on cylinder 4. The P0172 code indicates that the fuel mixture is richer than the mixture control can compensate for. It's possible that they are related, but not necessarily. Rich mixture...

Hello. These symptoms suggest something is causing big swings in the fuel mixture when this occurs - quite possibly the O2 sensors (https://www.yourmechanic.com/services/oxygen-sensor-replacement) (pre-catalytic converter - 2 of them). P0171 (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn) is a "lean mix" warning, and P0172 (https://www.yourmechanic.com/article/p0172-obd-ii-trouble-code-system-too-rich-bank-1-by-blake-griffin) is...

The P0137/P0157 codes indicate the "rear" (behind the catalytic converters) oxygen sensors are not functioning properly. In turn, they are signaling (incorrectly) for more fuel, which is causing the P0172/P0175 over-rich codes. This is clogging your converters, as well as...

Hello. From the symptoms you describe, it would appear that your vehicle is having issues with the oxygen sensors (https://www.yourmechanic.com/services/oxygen-sensor-replacement). P0172 (https://www.yourmechanic.com/article/p0172-obd-ii-trouble-code-system-too-rich-bank-1-by-blake-griffin) is the code for bank 1 being too rich. This can be caused by a wide variety of...