Showing articles & questions for topic
P0172

Related articles

P0172 OBD-II Trouble Code: System Too Rich (Bank 1)
P0172 code definition? P0172 is a trouble code that is set when the ECU senses that there may be too much gasoline present in the air-fuel mixture of the engine....

Related questions

Question
How I replace fuel filter
The fuel filter for your car is in the fuel tank. If you want to replace it, you will need to replace the fuel pump. It isn't regularly serviceable item anymore. As for the codes, the P0172 indicates there is...
Question
Vehicle started running rough while driving. Now running/idling rough running rich.
Hello. From the symptoms you describe, it would appear that your vehicle is having issues with the oxygen sensors. P0172 is the code for bank 1 being too rich. This can be caused by a wide variety of issues. The...
Question
2012 Mini Cooper Countryman O2 Sensors May have gone bad.
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...
Question
Trouble running when the engine warms up, dash lights on - 2007 Subaru B9 Tribeca
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...
Question
Car idles and multiple trouble codes are triggered
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...
Question
Car is jerking back and forth. P0171 and P0172 codes are on.
Hello. These symptoms suggest something is causing big swings in the fuel mixture when this occurs - quite possibly the O2 sensors (pre-catalytic converter - 2 of them). P0171 is a "lean mix" warning, and P0172 is a "rich mix"...
Question
My car shows P0172 but the car is running fine
Hi there. As you already know, replacing components without diagnoses, can be expensive and time consuming without resolution. The P0172 code is an indication of too much fuel or not enough air is being delivered to the engine. The ECM...

Need a mechanic?

Our certified mobile mechanics make house calls in over 700 U.S. cities. Fast, free online quotes for your car repair.

Get a quote

Post a question and get free advice from our certified mechanics.


Ask a question