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bms_a050
Moderate
Tesla · SUVs
Battery coolant level low
Quick Answer
Error code BMS_a050 on your Tesla SUVs means: Battery coolant level low. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
TMCTTMX1TMX1_PTM3YTM3Y_LRTM3Y_P
Likely Causes
  1. Coolant leak in thermal management system
  2. Loose or damaged coolant hose connections
  3. Coolant expansion tank cap not sealed
  4. Coolant pump seal failure
  5. Pinhole leak in coolant lines
How to Fix It
1
Locate coolant expansion tank under front trunk
2
Inspect for visible coolant leaks underneath vehicle
3
Check all coolant hose connections for tightness
4
Top up coolant reservoir with Tesla approved coolant
5
Monitor coolant level for 48 hours for leaks
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Coolant
Coolant hose assembly
Related Error Codes
DI_a180DI_a190BMS_a066BMS_a064CP_a043
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