Mazda
Coil antenna built into the push-button start switch has an error. Backup key reading (when fob battery is flat) may not work.
B10D9 fault code: what it means
B10D9: Coil antenna built into the push-button start switch has an error. Backup key reading (when fob battery is flat) may not work.
Usual causes, most likely first
- push button start switch coil antenna
- wiring fault
- start stop unit
B10D9 by make
What the repair usually costs
- Smart / proximity key supply and program (push-button start, sublet locksmith)NZ$430–NZ$960 · A$320–A$760
Not sure what B10D9 means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.