Check engine light on with DTC P0456 stored in the PCM memory
Mazda technical service bulletin 01-005-19-3548 for 2011-2019 Mazda MAZDA3, 2013-2019 Mazda CX-5 and 2014-2018 Mazda MAZDA6 and others.
- Bulletin number
- 01-005-19-3548
- Component
- Engine and engine cooling
- Summary
- 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.
Owners of these vehicles have filed 1,013 complaints in the engine category.
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