P1619 – Immobilizer EEPROM Error (Toyota)

Description

The ECM detected an EEPROM memory error in the immobilizer system affecting key authentication.

Need More Than Just the Fault Code?

A diagnostic scanner with live data, freeze-frame information and the right system access can help you investigate the actual cause before replacing parts.

Compare Diagnostic Scanners

Symptoms

No start condition
Security light on
Key not accepted
Intermittent start
Failsafe mode

Causes

EEPROM corruption
Internal immobilizer fault
Voltage instability
Connector corrosion
Wiring issues

Diagnosis

Scan immobilizer system
Inspect connectors
Check voltage stability
Test immobilizer ECU
Verify grounds

Repair

Replace immobilizer ECU
Repair wiring
Clean connectors
Stabilize voltage
Replace ECM if required