B16AE fault code: what it means

B16AE: BYD: ignition encryption (immobiliser/key coding) fault. Car may not power up to drive.

Body · Costly if missed

Usual causes, most likely first

key or smart-key module not matched
module replaced without coding
low 12V battery

B16AE by make

BYD

BYD: ignition encryption (immobiliser/key coding) fault. Car may not power up to drive.

Usual causes: key or smart-key module not matched; module replaced without coding; low 12V battery

What the repair usually costs

Smart / proximity key supply and program (push-button start, sublet locksmith)NZ$430–NZ$960 · A$320–A$760
Smart key supply and program (European, sublet locksmith or dealer)NZ$580–NZ$1,540 · A$550–A$1,480
Hybrid 12 V auxiliary battery (Aqua / Prius C / Axio, S34B20R)NZ$330–NZ$510 · A$310–A$500
Hybrid 12 V auxiliary battery (Prius 30 / Prius alpha / CT200h, S46B24R AGM)NZ$390–NZ$690 · A$360–A$590

Not sure what B16AE 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.