DTC 81: Engine Control System (Including PCM) Malfunction
WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
- Check for PGM-FI System DTCs with the HDS (see
GENERAL TROUBLESHOOTING INFORMATION
).
Are any DTCs indicated?
YES -Troubleshoot the indicated PGM-FI system DTC(s).
NO -Go to step 2.
- Clear the DTCs with the HDS (see HOW TO CLEAR DTCS ).
- Test-drive the vehicle with the adaptive cruise control (ACC) activated.
- Check for DTCs with the HDS (see HOW TO CLEAR DTCS
).
Is DTC 81 indicated?
YES -Check for loose or poor connections. If OK, update the ACC unit (see ACC UNIT UPDATE ), then recheck. If the ACC unit was already updated, replace the ACC unit (see ADAPTIVE CRUISE CONTROL (ACC) UNIT REMOVAL/INSTALLATION ).
NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections.