Service bulletins for the 2019 Mazda MX-5
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.
301 on file from NHTSA, as of 2026-10-19.
About U0401 on the 2019 Mazda MX-5: what the code means, and the bulletins and recalls about the same components.
By type
By component
By trouble code
By topic
Only bulletins with trouble code: U0401 are shown. Show all
| 01-015-18-3513a | 2018-11-13. Service bulletin. ENGINE. Some vehicles may experience a lack of power and the check engine light on with DTC P061B:00 and U0401:00 stored in the PCM memory when engine cranking is interrupted and on A/T vehicles, DTC U0442:00 is also stored. This concern most likely occurs when the brake pedal is released during engine cranking. DTC P061B:00 - [PCM] Internal control module torque calculation performance problem. DTC U0401:00 - Signal error from PCM DTC U0442:00 - [TCM] Invalid data received from PCM. Due to an improper control logic of the PCM, the engine torque calculation error detection is too sensitive. To eliminate this concern, the PCM software has been modified. |
|---|
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.