Tesla alert code · Electrical system
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Tesla GTW_w174 alert: Schedule service to replace low voltage battery
GTW_w174
Schedule service to replace low voltage battery
Software will not update until battery is replaced
Needs attention
Top line is Tesla's on-screen wording. The level is RideRite's own read.
2 / 23
Teslas on RideRite's tools that have logged GTW_w174
2
times it was recorded in all, as of September 2026
Short answer
The car's own monitoring has decided its low voltage (12V) battery needs replacing, and it will hold back software updates until it is. Level: needs attention.
What GTW_w174 means
The car's own monitoring has decided its low voltage (12V) battery needs replacing, and it will hold back software updates until it is. This is Tesla's call, not ours: the alert's internal name is GTW_w174_Replace12VBattery. A failing low voltage battery can leave a Tesla unable to wake, unlock or drive.
What to do
- 1Book a low voltage battery replacement soon.
- 2Until it is replaced, do not rely on the car for an important trip, since a dead low voltage battery can leave it unable to wake or unlock.
- 3A mobile technician can replace it at your home.
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Ongoing
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An email in plain English if GTW_w174 comes back or a new alert appears, plus slow tire leaks and battery drain while parked.
Written review
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A RideRite master technician reads everything your car reported and tells you what to fix now, what can wait, and what Tesla may still owe you.
Get it fixed
Want GTW_w174 looked at without a trip to the service center?
Ride Rite is a mobile Tesla repair shop based in San Jose. We diagnose 12V and electrical warnings in your driveway or office lot across the Bay Area with dealer-grade diagnostic equipment, then tell you plainly what the car needs.
Common questions
Does GTW_w174 really mean the 12V battery needs replacing?
Yes. It is the car's own verdict from its battery monitoring, and the alert's internal name is literally Replace12VBattery. A technician can load test the battery to confirm before replacing it.
How urgent is GTW_w174?
Soon. Tesla's message asks you to schedule service. On one of the two cars we have seen it on, the 12V battery went dead at the same moment the alert fired.
Why won't my Tesla update with GTW_w174?
Tesla's own message says software will not update until the low voltage battery is replaced. Replacing the battery clears the block.
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See pricing and book onlineSources: the alert text and internal alert name your car reports to Tesla, Tesla's owner's manual where the code is listed, and alert records from Teslas connected to RideRite's tools.
All Tesla alert codes explained
Ride Rite Mobile Auto Services is an independent mobile Tesla repair shop in San Jose, California. Not affiliated with Tesla, Inc. General information, not a diagnosis of your specific car. Updated September 2026.
