TESLA Alert

CC-A021

CC_a021_CB_noMaster

Also written as CC_A021 / CC A021 / CC_a021_CB_noMaster / cc_a021_cb_nomaster

System
CC
Climate Control
Type
Alert
Category
HVAC
Severity
Alert

Why does the exact Tesla alert ID matter?

Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.

What does CC-A021 mean?

Tesla alert code in the Climate Control (CC) module. Charging is interrupted

Original Description

Charging is interrupted

Affected Tesla Models

Model SModel XModel 3Model Y

What You May Notice

  • CC-A021 may appear with another Tesla alert in the Climate Control (CC) system.
  • The vehicle may limit charging, driving, comfort, or safety features depending on the active alerts.
  • The alert may clear after sleep, but recurring alerts should be treated as service-relevant.

How to Diagnose and Resolve

  1. 1 Reboot the vehicle
  2. 2 Check for OTA software updates
  3. 3 Monitor over the next few drives; schedule service if alert recurs

Severity Notes

CC-A021 is an Alert in the Climate Control system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.

Other CC Codes

CC_a001 CC_a002 CC_a003 CC_a004 CC_a005 CC_a006 CC_a007 CC_a008
View all CC codes →