DTC 81: TPMS Control Unit Failure (RAM/ ROM/ADC/EEPROM/ALU)

WARNING: This page is about a different car, the 2008 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Low battery voltage can cause this DTC. Make sure the battery is fully charged and in good condition.

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Turn the ignition switch OFF, then turn it ON (II) again.
Check for DTCs with the HDS.
Is DTC 81 indicated?

YES - Replace the TPMS control unit (see TPMS CONTROL UNIT REPLACEMENT ).

NO - The system is OK at this time.