DTC Advanced Diagnostics: P062F(PGM-FI System (3.0L Engine))
DTC P062F: Powertrain Control Module (PCM) EEPROM Failure
General Description
The powertrain control module (PCM) has data that needs to be retained even when the 12 volt battery is removed. Therefore, the PCM equips electrically erasable programmable read-only memory (EEPROM) that is able to re-write by a software and retain data in case of 12 volt battery disconnection. During the vehicle is in ON mode, the random access memory (RAM) (back-up RAM and normal RAM) performs calculation and writes information that needs to be retained to the EEPROM when the vehicle is turned to the OFF (LOCK) mode. The PCM monitors the EEPROM writing condition after the vehicle is turned to the OFF (LOCK) mode and confirms if the data is written properly on next vehicle ON mode. If the data cannot be written to the EEPROM for a specified time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | - |
| DTC Type | One drive cycle, MIL on |
Enable Conditions
| Condition | |
|---|---|
| Vehicle | ON mode |
Malfunction Threshold
The data cannot be written to the EEPROM at least 2 times.
Possible Cause
- PCM internal circuit failure (EEPROM, flash controller)
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, the freeze data, and the on-board snapshot are stored in the PCM memory.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.