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 XLE, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ELECTRICALSTARTERSTOP AND START SYSTEM - DIAGNOSTIC CODES (1 OF 3)STOP AND START SYSTEMDTC P062F-44: INTERNAL CONTROL MODULE EEPROM DATA MEMORY FAILURE [10/2022 - ]TYPICAL MALFUNCTION THRESHOLDS
2025 Toyota Highlander XLE, FWD
Typical Malfunction Thresholds
2025 Toyota Highlander XLE, FWDSECTION Typical Malfunction Thresholds
CASE 1
| The following condition is met | 2 data or more |
| One of the following conditions (a), (b) or (c) is met | More than 3 times |
| (a) EEPROM access error | Occurred |
| (b) Permanent Fault Code | Not stored |
| (c) Permanent Fault Code | Not equal to commanded Fault Code |
CASE 2
| The following condition is met | 2 data or more |
| Either of the following conditions (a) or (b) is met | More than 3 times |
| (a) EEPROM access error | Occurred |
| (b) Permanent Fault Code | Stored |
CASE 3
| Either of the following conditions (a) or (b) is met | - |
| (a) The following condition is met | 2 data or more |
| EEPROM access error (more than 3 times) | Occurred |
| (b) Permanent Fault Code data (more than 10 times) | Mismatch |
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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.