P0172 on Mazda vehicles The engine is running rich on bank 1: too much fuel for the air going in
P0172 is named on 17 Mazda model years (2016–2019): 17 manufacturer filings and 0 owner reports in NHTSA’s files, across CX-3, CX-5, CX-9, MX-5, Mazda3 and 1 more.
Which Mazda model years name P0172
Source: NHTSA manufacturer communications and complaints| Model year | Filed under | Bulletins | Owner reports |
|---|---|---|---|
| 2019 Mazda CX-3 | Engine | 1 | — |
| 2018 Mazda CX-3 | Engine | 1 | — |
| 2018 Mazda CX-9 | Engine | 1 | — |
| 2018 Mazda MX-5 | Engine | 1 | — |
| 2018 Mazda Mazda3 | Engine | 1 | — |
| 2018 Mazda Mazda6 | Engine | 1 | — |
| 2017 Mazda CX-3 | Engine | 1 | — |
| 2017 Mazda CX-5 | Engine | 1 | — |
| 2017 Mazda CX-9 | Engine | 1 | — |
| 2017 Mazda MX-5 | Engine | 1 | — |
| 2017 Mazda Mazda3 | Engine | 1 | — |
| 2017 Mazda Mazda6 | Engine | 1 | — |
| 2016 Mazda CX-3 | Engine | 1 | — |
| 2016 Mazda CX-9 | Engine | 1 | — |
| 2016 Mazda MX-5 | Engine | 1 | — |
| 2016 Mazda Mazda3 | Engine | 1 | — |
| 2016 Mazda Mazda6 | Engine | 1 | — |
A model year is listed because the code is named in its own record — a bulletin filed against it, or an owner’s complaint about it — not because every one of these vehicles sets it. Counts are documents in NHTSA’s files, not failure rates.
Mazda filings that name P0172
Source: NHTSA manufacturer communicationsBulletins and campaigns Mazda filed with NHTSA whose summary names P0172. Quote the document number at the service desk — it is a diagnosis the maker has already written down.
- SA-026-18 Service bulletin2018-05-08 · Engine
- If a vehicle is driven on extremely short trips most of the time (where the engine never reaches normal operating temperature), the engine oil may become diluted with fuel and the engine oil level will increase. Engine oil dilution with fuel occurring under this specific driving condition is normal with direct injection engines. If the vehicle is driven on a longer trip after a lot of short trips
What P0172 means
Source: SAE J2012 / OBD-IIThe engine is running rich on bank 1: too much fuel for the air going in.
A stored code names the test that failed, never the part that caused it. The record above is what Mazda and its owners have filed about it; the code’s page across every make has the whole file.
Common questions
Source: NHTSA files and the OBD-II standardIs P0172 a known problem on Mazda vehicles?
It is a documented one: NHTSA's files hold 17 manufacturer filings and 0 owner reports naming P0172 on 17 Mazda model years (2016–2019). Whether it is a problem on one particular car is a diagnosis, not a count — but a bulletin that names the code on your model year is the place to start.
Which Mazda models does P0172 appear on most?
2019 CX-3 (1 document), 2018 CX-3 (1 document), 2017 CX-3 (1 document).
Does P0172 on a Mazda mean it is recalled?
No. Recalls are filed by campaign and matched by VIN; no recall is triggered by a scan tool. Check the VIN at nhtsa.gov/recalls, or open the model year's page here for the campaigns filed against it.