P062F: Internal Control Module EEPROM Error

What it means

The control module detected an EEPROM error. The code alone does not establish that calibration values are corrupted or that the module is running on defaults.

At a glance

• Usually lights the check-engine light

How it works

EEPROM is non-volatile memory in a control module that stores data the module needs to retain when power is off. P062F sets when the module detects an EEPROM error; it does not establish that calibration data are corrupted or that the module has switched to default values.

Common causes

Most likely first.

1. Internal EEPROM memory or checksum fault
2. Low or unstable module power during a write operation
3. Poor module power or ground connection
4. Control-module hardware or software fault

Symptoms

• Check engine light on
• Possible limp mode or no-start
• Multiple follow-up faults across modules
• Reset/relearn may be needed after repair

How to diagnose it

1. Record freeze-frame data and scan all modules for memory, programming, communication, and low-voltage codes before clearing anything.
2. Check battery condition and charging-system stability, and review whether the fault appeared after a battery or module power interruption.
3. Inspect the affected module's power, ground, and connectors for looseness, corrosion, or signs of interrupted supply.
4. Verify module power and grounds under load and follow the manufacturer's procedure to confirm whether the EEPROM fault returns after a proper reset or programming check.
5. Consider module repair or replacement only after power, wiring, and applicable software updates have been ruled out.

Common fixes

• Repair poor module power or ground connections.
• Correct an unstable battery or charging-system supply.
• Complete a manufacturer-approved module software update or reprogramming if applicable.
• Repair or replace the control module if the EEPROM error persists after circuit and programming checks.

Can I keep driving?

If the vehicle starts and drives normally, limit use until the code is diagnosed because module memory problems can cause unpredictable faults or a no-start. Do not rely on it for a long trip if warning lights, shifting, or engine operation become abnormal.