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.
Circuit Description - DTC P3140 - Information Code 350: Notes
- When using an OBD II scan tool other than TOYOTA hand-held tester, check all the steps.
- When using TOYOTA hand-held tester, confirm the information code and check it.
If the HV ECU detects the operation of the safety devices (removal of the service plug, inverter terminal cover and sensor cover) while the vehicle is not running (with the vehicle is stopped), it will shut down the system main relay. It the safety devices are correctly installed, it will resume the normal operation after the power source is supplied again. If it does not, there is a possibility of an open circuit, so perform the same Inspection as the information code 351.
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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.