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luc_12v01
Easy Fix
Lucid · Sedans
12V Auxiliary Battery Low
Quick Answer
Error code LUC_12V01 on your Lucid Sedans means: 12V Auxiliary Battery Low. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
LAGTLAGTPLAPLASLAT
Likely Causes
  1. 12V auxiliary battery reaching end of service life and losing capacity
  2. DC-DC converter not adequately maintaining 12V system from high-voltage source
  3. Parasitic current draw from accessories or control modules during sleep mode
  4. Corroded or loose 12V battery terminal connections increasing resistance
  5. Extended vehicle storage without regular charging depleting 12V battery
How to Fix It
1
Check 12V battery voltage with a multimeter; resting voltage should be above 12.4V
2
Inspect both 12V battery terminals for corrosion and clean if necessary
3
Connect vehicle to an AC charger to allow the DC-DC converter to replenish the 12V battery
4
Check for parasitic drain by monitoring 12V current draw in sleep mode via diagnostic tool
5
Replace the 12V auxiliary battery if it fails a load test or does not hold charge
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
12V auxiliary battery (OEM-specification)
Battery terminal cleaning kit
DC-DC converter module if found faulty
Multimeter for voltage verification
Related Error Codes
LUC_HV001LUC_HV002LUC_HV003LUC_CP001LUC_CP002
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