Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2025HIGHLANDER HYBRID XLEREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM (A25A-FXS) - DIAGNOSTIC CODES (P05B1-06DA)SFI SYSTEMDTC P062F-44: INTERNAL CONTROL MODULE EEPROM DATA MEMORY FAILURE [11/2023 - ]PROCEDURE
2025 Toyota Highlander Hybrid XLE
DTC P062F-44: Internal Control Module EEPROM Data Memory Failure [11/2023 - ]: Procedure
2025 Toyota Highlander Hybrid XLESECTION Procedure
- CLEAR DTC
Result:
NEXT
See step 2
- READ OUTPUT DTC (DTC P062F-44)
- Disconnect the cable from the negative (-) auxiliary battery terminal and wait for 1 minute.
- Connect the cable to the negative (-) auxiliary battery terminal.
- Start the engine and wait 30 seconds or more.
- Read the DTCs.
Powertrain > Engine > Trouble Codes
Result
Result Proceed to DTCs are not output A DTC P062F-44 is output B
Result:
A
CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS [12/2019 - ]
Result:
B
REPLACE ECM. Refer to REMOVAL [11/2023 - ]
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.