B1600 on the 2004 Mazda Mazda3
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.
This code is specific to a manufacturer and is not described here. Its meaning is in the manufacturer's service information.
| 01012004 | 2004-09-10. Service bulletin. ENGINE NO CRANK ALONG WITH IMMOBILIZER MALFUNCTION. DIAGNOSTIC TROUBLE CODES P1260 (IMMOBILIZER SYSTEM PROBLEM) AND B1600/B1602 (KEY ID NUMBER CANNOT BE READ) AND/OR U2516 (IC-CAN BUS OFF TRANSMIT ERROR) MAY BE STORED IN MEMORY. MAZDA M-TIPS. *TT |
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1 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.