Service bulletins for the 2018 Mazda CX-3
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
477 on file from NHTSA, as of 2026-10-19.
About P0456 on the 2018 Mazda CX-3: what the code means, and the bulletins and recalls about the same components.
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Only bulletins with trouble code: P0456 are shown. Show all
| 01-005-19-3548 | 2019-02-19. Service bulletin. ENGINE AND ENGINE COOLING. Some vehicles may exhibit the check engine light on with DTC P0456 stored in the PCM memory. P0456: EVAP system leak detected (very small leak). The concern is most likely the result of the customer not getting the fuel cap completely closed after fueling the vehicle. This causes a small fuel vapor leak and turns DTC P0456 on. |
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| 01-013-18-3478 | 2018-07-02. Service bulletin. ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Some vehicles may exhibit the check engine light on with DTC P0456 stored in the PCM memory. P0456: EVAP system leak detected (very small leak)The concern is most likely the result of the customer not getting the fuel cap completely closed after fuelingthe vehicle. This causes a small fuel vapor leak and turns DTC P0456 on. |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.