DTC Troubleshooting: P16A3 (00)
DTC P16A3:
 ECM Internal Circuit Malfunction
NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.
  1. Turn the ignition switch ON (II).
  1. Reset the ECM with the HDS.
  1. Turn the ignition switch OFF, and wait 2 minutes.
  1. Turn the ignition switch ON (II).
  1. Check for Temporary DTCs or DTCs with the HDS.
Is DTC P16A3 indicated?
YES -
Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM. ■
NO -
Intermittent failure, the system is OK at this time.■