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.
2021 Lexus GX 460 BaseFACTORY OEM SERVICE PROCEDURE
DTC P062F: Internal Control Module EEPROM Error [08/2015 - ]: Procedure
- READ OUTPUT DTC (DTC P062F)
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG).
- Turn the Techstream on.
- Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - ] ).
- Turn the engine switch off and turn the Techstream off.
- Disconnect the Techstream.
- Disconnect the cable from the negative (-) battery terminal and wait for 1 minute.
- Connect the cable to the negative (-) battery terminal.
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) and turn the Techstream on.
- Wait 30 seconds or more.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Read the DTCs.RESULT
Result Proceed to No output A P062F is output B
Result:
A
CHECK FOR INTERMITTENT PROBLEMS
(Refer to CHECK FOR INTERMITTENT PROBLEMS [08/2015 - ] )
Result:
B
REPLACE ECM
(Refer to REMOVAL [08/2015 - ] )
Factory Service Tools
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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.