P062F
Internal Control Module EEPROM Error
The ECU's EEPROM (persistent calibration storage) reports a check-sum or write error. Calibration values may be corrupted - the ECU runs on safe defaults until repair.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
Common causes
Ordered by how often each turns out to be the cause.
- EEPROM check-sum failureCommon
Parts involved
- ECU Eeprom
P062F is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.