Code CP_a113 was reported by the “Charge port” controller in the car. The letter “a” in the middle places it among entries of the alert type.
The car's charge port — latch, connector lock, indicator light and proximity sensor. These codes typically appear when the connector will not lock or the car does not register that it is plugged in.
The most common type. The car logged the event and may have shown it on the screen. The range is wide — from something trivial that clears itself to something that needs attention.
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.
A short circuit has been detected on the inlet heater hardware
The current going through the inlet heater was higher than 4.5A
Setting the UI defrost command to low
The inlet heater won't be enabled which might lead to the charge port staying frozen
Expected GTW CAN messages are missing
Inductive sensor and potentiometer readings of door presence do not match
IEC combo charge session shutdown occurred
Pilot sensor readings are unexpected. Indicates issue with vehicle if alert is set with no charge cable connected.
info from manualCP_A010
The sensed pilot voltage, period, or duty cycle are invalid and cannot be categorized into a valid pilot state
The sensed pilot voltage, period, and duty cycle are valid, OR the CP closes its SWCAN relay
The ivled is stuck in uncontrolled state
Charge port ivled is not responding ECU control
The ivled responds to control from ECU
Charge port ivled may illuminate when not intended or may not illuminate when intended
Charge port detected an error with PLC modem
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.