Tesla Model Y 2021 - Hard to Start / Clicking Sound
The vehicle exhibits a hard start or no-start condition accompanied by a clicking sound every time. This is typically indicative of a low or failing 12V auxiliary battery, which is critical for engaging the high-voltage contactors and powering the vehicle's electronics.
Diagnosis Details
Possible Causes
12V auxiliary battery is discharged or failed. The clicking sound is the contactor trying to engage but lacking sufficient power.
Faulty high-voltage contactor or DC-DC converter preventing proper power distribution.
Corroded or loose battery terminal connections on the 12V battery.
Related OBD-II Codes
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What You Should Do
Attempt to jump-start the 12V battery using a compatible lithium-ion jump pack or another vehicle (follow Tesla's jump-start procedure).
If the car starts, drive to a service center to replace the 12V battery.
If it does not start, the 12V battery may be completely dead and requires replacement.
Do not attempt to jump-start with a traditional lead-acid charger without proper voltage regulation.
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.