DTC 16

DTC 15: Front left tire pressure drops to 28 PSI or less
DTC 16: Front right tire pressure drops to 28 PSI or less
DTC 17: Rear right tire pressure drops to 28 PSI or less
DTC 18: Rear left tire pressure drops to 28 PSI or less

Check and adjust tire pressures to specification. Manufacturer provides no other diagnostic information.