Code HVP_w006 was reported by the “High-voltage protection” controller in the car. The letter “w” in the middle places it among entries of the warning type.
The high-voltage protection unit — battery contactors, current measurement and the HVIL safety loop that disconnects high voltage the moment a connector comes loose. These codes turn up after collisions and after service work alike.
The car is flagging that something is not right. Driving is usually still possible, but some function may be limited.
This is how the fault is named inside the car's firmware. For codes without a description it is the most precise clue there is — the name itself says what the event is about.
The text below comes from Tesla's technical documentation. We leave it in the original English so that translation cannot shift its meaning.
Warns if the pack charge current is above max charge current limit
The pack charge current is above max charge current limit for X duration (in msec)
The pack charge current is below max charge current limit
The DC charging will end and contactors may open immdediately or pyro may disconnect
Warns if the CP ECU has faulted
These charging will not be allowed
Sets if an HVIL fault is detected. Contactors cannot close (car will no longer drive) if the contactors are currently open. If no repairs were performed and the alert clears on its own, there is risk of reoccurrence.
The HVIL is broken or HVIL nodes are lower than expected
Contactors will not close, it may open if vehicle not in drive
Warn if pack contactor enter to the BLOCKED state
Warns if the Energy reserve voltage supply is below minimum voltage threshold
The Energy reserve voltage supply is below minimum voltage threshold
The Energy reserve voltage supply is above minimum voltage threshold
The pyro diagnostics may fail, the contactors will not close
warn if harware triggers to blow the pyro
This is an indication that pyro was blown
The HVP config block may be missing, incorrect, or unsupported
The HVP is unable to initialize configuration parameters
Copy it exactly, letter and number included. Photographing the screen is safest — codes often differ by a single digit, and mixing them up leads somewhere else entirely.
Some codes clear after a screen restart or after the car sits locked for a few hours. If the code does not come back, it was usually a one-off glitch.
A one-off entry and a code that appears after every drive are two different things. It helps a service centre enormously if you know exactly when it shows up.
With airbags, brakes, steering and high voltage there is no point waiting it out. With the other groups you can watch and see whether the code returns at all.
Error codes are only part of the picture. For cars on TesList you also see battery health pulled straight from the vehicle, plus a price calculator that works out from current listings what a given car is actually worth today.