DTC Troubleshooting

DTC Troubleshooting: U0300

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

NOTE:

- Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information. Initial Inspection and Diagnostic Overview

- Do not turn the ignition switch to ACC (I) or to LOCK (0) while updating the PCM. If you do, the PCM will be damaged.

1. Do the PCM update procedure (PGM-FI system and A/T system). ECM/PCM Update (A/T)

2. Check for Temporary DTCs or DTCs with the HDS.

Is DTC U0300 indicated?
YES - Replace the original PCM. Service and Repair

NO - Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.