P1622 – ECM EEPROM Error (Nissan)

Description

The ECM detected an EEPROM read/write error.

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Symptoms

  • No start
  • Intermittent faults

Causes

  • EEPROM damage
  • Programming error
  • Voltage instability

Diagnosis

  • Scan ECM for codes
  • Check power supply
  • Verify programming

Repair

  • Reprogram ECM
  • Replace ECM