1. DTC P1621 description
The learning data, VIN data, and immobilizer security information is stored in the EEPROM inside the ECM. If the ECM detects an error in any data, the DTC is set.
2. Condition for setting DTC P1621
Condition for running the DTC
- The ignition switch is ON.
Condition for setting the DTC
- The ECM detects an error in the learning data stored in the internal EEPROM.
3. Action taken when DTC P1621 sets
- Euro4: The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type A (Euro4).
- Except Euro4: The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets - Type A (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".
4. Condition for clearing DTC P1621
- Euro4: Refer to Condition for clearing the MIL/DTC - Type A or Type B (Euro4).
- Except Euro4: Refer to Condition for clearing the check engine warning light/DTC - Type A or Type B (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) DTC type definitions".