Charge Port Pin Temperature Exceeded Safe Threshold
The TESLA-CHARGE_A043 (Tesla Charge Port Controller) EV fault code means: Charge Port Pin Temperature Exceeded Safe Threshold. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $0-$50 DIY (cleaning kit, replacement adapter). Pro port replacement: $300-$800 parts and labor at an independent EV shop. Tesla Service Center pricing varies by region and is typically higher.
A $30 car code reader can't do diesel. The HD7000 reads full-system codes and does parked DPF regen, idle/speed-limit, and service resets from the cab — on everything from a 6.7 Cummins/Power Stroke/Duramax pickup to Class-8 trucks (Detroit, Paccar, CAT, Volvo, Mack, International).
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Full-system 6/9/16-pin diesel scan tool for Cummins, Paccar, CAT, Detroit and more — plug-and-play, no subscription. A cheaper way to read heavy-duty codes a basic OBD2 scanner skips entirely.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Common Symptoms
- Charging session slows dramatically or stops entirely at a Supercharger or home charger
- Touchscreen displays a charge port warning with a temperature or slow-charge alert
- Charge port latch LED pulses amber or red instead of solid green
- App shows charging speed dropped to a few miles of range per hour or zero
- Charge port area feels warm to the touch near the door or latch
- Vehicle sends a push notification saying charging has been interrupted or limited
- Plugging back in after a short break does not resume normal charge speed until the port cools
Probable Causes (Ranked by Likelihood)
- Dirty or oxidized charge port pins causing elevated contact resistance and heat buildup Very Likely
- Worn or damaged NACS adapter with high-resistance pin contact, especially third-party cables Very Likely
- Ambient temperature is high combined with sustained high-power Supercharging, pushing pin temps over threshold Likely
- Charge port latch or thermal sensor partially failed, reading falsely high temperature Possible
- Foreign debris or moisture trapped in the charge port receptacle creating a partial short or resistance spike Possible
- Worn charge port receptacle with loose-fitting pin contact after high charge cycle count Less Likely
- BMS or thermal management system not pre-conditioning the battery before high-power charging, leading to thermally stressed session Less Likely
Step-by-Step Diagnostic Procedure
Open the charge port door and visually inspect all pins under a flashlight. Look for black discoloration, pitting, corrosion, or melted plastic around any pin. Any visible burn marks mean do not charge until a technician inspects the port.
Check your NACS adapter or charge cable connector for the same damage. If you are using a non-Tesla adapter or cable, swap to a known-good Tesla-supplied cable at a Supercharger stall and see if the fault clears.
Clean the charge port pins gently with a dry, lint-free cloth or a soft-bristle brush. Do not spray liquids directly into the port. Tesla recommends a small amount of isopropyl alcohol on the cloth only if contamination is visible.
Let the port cool for 10-15 minutes with the charge port door open before retrying. The thermal sensor must read below threshold before charging resumes at full speed. Check the touchscreen or Tesla app for current charge port temperature status.
Use Scan My Tesla with an OBDLink MX+ or Veepeak adapter to pull live BMS and charge port data. Look for CHARGE_a043 alongside any BMS or VCFRONT codes that indicate whether the fault is isolated to the port or is part of a broader thermal event.
Try a different Supercharger stall or a different charging location entirely. If the fault only appears at one stall, the stall itself may be delivering higher-than-expected current spikes. If the fault follows the car across multiple chargers, the port or adapter is the issue.
Inspect the charge port latch for smooth operation. A sticking latch can hold the connector at a slight angle, increasing contact resistance. Press the latch button and confirm the connector seats and releases cleanly.
If the fault is persistent across multiple charge sessions, clean locations, and known-good cables, the charge port receptacle likely needs replacement. This requires Tesla Toolbox 3 and port replacement by a Tesla Service Center or a qualified independent EV shop. Do not attempt to disassemble the charge port housing yourself.
Frequently Asked Questions
What does Tesla code CHARGE_a043 mean?
It means the temperature sensor inside the charge port detected that one or more pins got too hot during a charging session. This usually happens because of dirty or worn pins creating electrical resistance, which turns into heat. The car slows or stops charging to protect the port and the battery.
Can I still drive the car with this code active?
Yes, you can drive normally. The fault affects charging only, not drive operation. That said, if you see any burn marks on the port or adapter, have it inspected before charging again to avoid a more serious failure.
How much does it cost to fix CHARGE_a043?
If cleaning the port pins and swapping to a known-good Tesla cable clears it, your cost is essentially zero. A replacement NACS adapter runs $20-$50. If the charge port receptacle itself is worn or damaged, expect $300-$800 at an independent EV shop for parts and labor. Tesla Service Center rates vary and are often higher.
Will my car charge normally after letting it cool down?
Most of the time, yes. Let the port cool for 10-15 minutes with the door open, then retry at a different Supercharger stall if possible. If full-speed charging comes back and the fault does not return, a contaminated or warm port was the culprit. If the fault keeps coming back across multiple sessions and locations, the port or adapter needs physical inspection or replacement.