DTC U0300: PGM-FI System and A/T System Program Version Mismatch

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.

NOTE:

Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).
Do not turn the ignition switch to ACC (I) or LOCK (0) while updating the PCM. If you do, the PCM will be damaged.

Do the PCM update procedure for the PGM-FI and A/T systems (see PCM UPDATE ).
Check for Pending or Confirmed DTCs with the HDS.
Is DTC U0300 indicated?

YES -Replace the original PCM (see PCM REPLACEMENT ).

NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC'S TROUBLESHOOTING .