P219B on the 2011 Mazda CX-9
The bulletins listed name this code in NHTSA's summary, or are about the same components. A bulletin or a recall listed here may apply to the model year. None of it is a diagnosis.
Nobody has written a description of this code yet.
| 01-027-13-2836a | 2017-08-10. Service bulletin. Some vehicles may experience MIL illumination with DTC P219A:00 and/or P219B:00 stored in PCM memory. The DTCs may be caused by abnormal electrical noise within the engine harness of certain vehicles. To elimi-nate this concern, separate the A/F sensor signal lines from the emission harness by installing the short cord service part detailed in this bulletin. |
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| 01-006-15-3039 | 2017-05-19. Service bulletin. SOME VEHICLES MAY EXPERIENCE MIL ILLUMINATION WITH DTC P219A:00 AND/OR P219B:00 STORED IN PCM MEMORY. THE DTCS MAY BE CAUSED BY ABNORMAL ELECTRICAL NOISE WITHIN THE ENGINE HARNESS OF CERTAIN VEHICLES. TO ELIMINATE THIS CONCERN, SEPARATE THE A/F SENSOR SIGNAL LINES FROM THE EMISSION HARNESS BY INSTALLING THE SHORT CORD SERVICE PART DETAILED IN THIS BULLETIN. |
| 01-027-13-2836 | 2017-04-24. Service bulletin. SOME VEHICLES MAY EXPERIENCE MIL ILLUMINATION WITH DTC P219A:00 AND/OR P219B:00 STORED IN PCM MEMORY. THE DTCS MAY BE CAUSED BY ABNORMAL ELECTRICAL NOISE WITHIN THE ENGINE HARNESS OF CERTAIN VEHICLES. TO ELIMI-NATE THIS CONCERN, SEPARATE THE A/F SENSOR SIGNAL LINES FROM THE EMISSION HARNESS BY INSTALLING THE SHORT CORD SERVICE PART DETAILED IN THIS BULLETIN. |
3 on file from NHTSA, as of 2026-10-19. See them in the bulletin list. A bulletin lists model years: read the document for which vehicles it concerns.