Fault Code Lookup › Powertrain codes › P0172
P0172 Powertrain · generic OBD-II
System Too Rich
P0172 is a standard code covering engine, transmission, fuel and emissions. It names the system that logged the fault, not the part that failed. Below: which cars owners reported it on, what happened, and recalls on those cars, from 9 complaints filed with NHTSA. Updated November 9, 2026.
- 9owner reports
- 7car models
- 0mention a crash
- 0mention a fire
- 2013–2021model years
Which cars get code P0172?
Every model whose owners mentioned P0172 in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.
Audi A3
1 reportBMW X3
1 reportDodge Durango
1 reportFord Edge
1 reportFord F-150
1 reportJeep Renegade
1 reportWhere does P0172 show up?
By brand
- Chevrolet3
- Ford2
- BMW1
- Audi1
- Jeep1
- Dodge1
Component the owner filed it under
Is there a recall for P0172?
The others concern the component owners file this code under (Engine) on the same cars; they may or may not relate to the code. Recall repairs are free; check your VIN at nhtsa.gov/recalls.
Engine And Engine Cooling: Engine Chrysler (FCA US LLC) is recalling certain 2017 Jeep Renegade vehicles equipped with a 2.4L engine. These vehicles may be equipped with a cracked oil pump housing/balance shaft module (BSM), which can cause the oil pump to fail and the engine to stall.
2017 Jeep Renegade. Full risk and remedy on each car's report.
What happened when owners saw P0172?
9 of the 9 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
2013 Equinox Awd - Issue while driving and coming to a stop or low idle car stalls out while waiting to turn in intersection. Very scary car goes into limp mode after about 15 minutes of driving with engine light on. Have taken to dealer ship in 3/31/2022 code p0191 and p0172 vehicle runs rough. Dealer replaced fuel tank fuel pump and said fixed. Driving home 15 min issue happened again took back to dealer. Dealer ran many test and replaced many parts with no luck solving issue after having car in shop until 7/29/2022. Dealer said to get a new car they have no idea how to fix issue and not safe to drive when stalling in bust traffic. Dealer stated they called manufacture and they didn’t have…
2017 AUDI A3 SEDAN- WITH AROUND 47,000 MILES -STALLED OUT IN DRIVE THRU AND AT A RED LIGHT INTERSECTION. TWICE. ALMOST GOT IN 2 ACCIDENTS WHILE DRIVING ONCE ON THE HIGHWAY AND ONCE ON A CITY ROAD. ENGINE LIGHT ON DASH WAS BLINKING. CODE READER INITIALLY WAS READING P0300, P0301 AND P0302 .. MULTIPLE CYLINDER MISFIRES. TOWED CAR TO AUDI, AND THEY DID COMPLETE MAINTENANCE SERVICE. RAN CODES AND NOW ALL OF THE SUDDEN IT NEED A NEW TRANSMISSION AND THE CODE IS P0172 BANK 1 SYSTEM TOO RICH. I NOTICED THERE WAS A RECALL FOR THE THE ENGINE CONTROL UNIT (ECU) SOFTWARE AND WHICH CAN AFFECT AIR / FUEL MIXTURE WHICH MAKES ME THINK THAT THIS RECALL WAS PROBABLY THE CAUSE, BECAUSE PO172 CODE CAN BE DUE…
The contact owns a 2021 BMW X3. The contact stated that upon refueling the vehicle and attempting to start the vehicle, the vehicle failed to start on several occasions. The contact stated that the vehicle was able to restart after several attempts. The vehicle was taken to Auto Zone, where DTC: P0172 and P0446 were retrieved. The contact related the failure to BMW TSB Number: SIB 01 02 24. An independent mechanic advised the contact to only fill the fuel tank to half full. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure and informed the contact that the VIN was not included in a recall. The contact was referred to the NHTSA Hotline for assistance. The…
Back to back error codes P0300 P0108 P1404 P0172 Rough running engine. Very strong smell of fuel at two different times while driving. Vehicle not responding to gas pedal while driving on highway. Repairs at thousands of dollars.
…The check-engine light is illuminated with diagnostic codes P0300, P0302, P0303 (engine misfires, cylinders 2 and 3), P0316 (misfire on startup), P0217, P1285, P1299 (overheating - the computer has entered cylinder-head over-temperature protection mode), P0299 (turbo underboost), P0012 (cam timing), P0172 (rich condition), and P0420. This matches Ford's own bulletin identifying coolant intrusion into the cylinders, a condition the bulletin says may require complete engine (long-block) replacement. The selling dealer (JD Byrider) was formally notified on 09/29/2026 and I have requested cooling-system pressure testing and cylinder inspection. Exact current mileage is unknown - the vehicle is…
HAD TO BUY A NEW ENGINE! THE TRUCK STARTED RUNNING ROUGH ON THE DRIVE HOME FROM WORK ON FRIDAY, APRIL 6. ON SATURDAY MORNING, APRIL 7, I TOOK IT TO GET GAS. AFTER FILLING MY TANK, THE TRUCK WOULD NOT START BACK UP. I HAD TO HAVE IT TOWED FROM THE GAS STATION. TOWED IT TO KELLER FORD, GRAND RAPIDS, MI. CODES P0011, P0016, P0017, P0019, P0021, P0172, P0175, P0299, P0313, P0365, P0369, P0390, P0394, P0430 AND P052C. THE TECHNICIAN ALSO PERFORMED A POWER BALANCE TEST AND A COMPRESSION TEST, IT WAS DETERMINED HALF THE ENGINE HAD ZERO COMPRESSION AND THE OTHER HALF HAD LOWERED COMPRESSION. ALL OF THESE RESULTS INDICATED THE TRUCK NEEDED A FULL ENGINE REPLACEMENT. $7,650 FOR THE NEW ENGINE. A…
…On July 25, another diagnostic showed Check Engine FAIL with codes P0172, P0455 and P0456. On July 31, the vehicle SHUT DOWN WHILE BEING DRIVEN and was stuttering on the way to the repair facility. The service record specifically documents the complaint that the vehicle “shut down while driving” and was “stuttering on way here.” The vehicle has also experienced recurring starting difficulty, particularly after refueling, and repeated check-engine warnings. I am concerned about the risk of an unexpected loss of power or engine stall while driving in traffic. I am not asserting that the prior fuel-pump recall caused the later shutdown; however, I am reporting the recall history, repeated…
Engine runs rich with a P0172 code and requires a new fuel pump to resolve the issue. Causes an engine light, fluctuating tach reading at idle, excess fuel consumption, and some performance issues as the computer figures out how to compensate.
The contact owns a 2015 Chevrolet Equinox. The contact stated that while driving at an undisclosed speed, the check engine warning light illuminated. While the vehicle was stopped at a traffic light, the vehicle jerked and idled roughly and nearly stalled. The vehicle was taken to Auto Zone to be diagnosed. The contact was provided with DTC P0172. The vehicle was not repaired. Several days later, the vehicle was taken for an oil change, and transmission fluid was flushed and refilled. The contact stated that on a separate occasion, a week after the oil change, the check engine warning light illuminated. The contact took the vehicle back to Auto Zone to be diagnosed. The contact was provided…
P0172: questions drivers ask
What does code P0172 mean?
P0172 is a generic OBD-II powertrain code. Its standard definition is "System Too Rich". The code tells you which system set the fault, not which part failed; the owner reports on this page show what it meant in practice for 7 car models.
Which cars get code P0172 most often?
In NHTSA owner complaints, P0172 is mentioned most for the Chevrolet Equinox (3), Audi A3 (1), BMW X3 (1), across 7 models and model years 2013 to 2021. Popular models collect more reports because more of them are on the road.
Is there a recall for code P0172?
No NHTSA recall text names P0172 directly. 1 recall on the cars that report this code concerns the same component owners name most (Engine); they may or may not relate to the code. Check your VIN at nhtsa.gov/recalls.
What should I do if my car shows P0172?
Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.
How this page was made
CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of P0172. The definition is the generic SAE J2012 wording; a carmaker may use the code slightly differently. Nothing here is a diagnosis. More answers: the fault code FAQ. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 9, 2026. How CarHooq reports are made.
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