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

WARNING: This page is about a different car, the 2006 Honda Odyssey and 2005 Honda Odyssey. 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.

Clear the DTC with the HDS (see HOW TO CLEAR TPMS DTCS ).
Turn the ignition switch OFF, then turn it ON (II) again.
Is DTC 81 indicated?
1. YES - Check for loose wires or poor connections at the TPMS control unit connectors. If necessary, substitute a known-good TPMS control unit and recheck.
2. NO - The system is OK at this time.