P1619 – Immobilizer EEPROM Error (Toyota)

Description

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

Want to confirm the real cause of this fault code?

A high-quality OBD2 scanner gives you live data, fuel trims, sensor readings and freeze-frame information — exactly what you need to verify the root cause of this code with confidence.

View Recommended 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

Related Problems

Related Fault Codes