Low Battery Positive Voltage — 12V Auxiliary Battery
The ABS/VSCM or body control module detected that 12V supply voltage is below the minimum threshold required for safe ABS, stability control, and module communication operation.
Estimated Cost
$80 – $2,500
Repair Time
30 min – 3 hours
DIY Difficulty
DIY Possible
Can I Fix This Myself?
DIY-Friendly Repair
Many owners resolve this with basic tools at home.
Tools you'll need:
Follow the step-by-step wizard below. If the issue persists after working through all steps, it's time to schedule a professional service appointment.
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Step-by-Step Diagnostic Wizard
Answer each question to narrow down the root cause of your C1241 fault.
Measure 12V Battery Voltage
Step 1 of ~7
Connect a multimeter to the 12V battery terminals (red to positive, black to negative). Measure with the vehicle off (resting voltage) and with accessories on.
Is 12V battery resting voltage below 12.0 V or does it drop below 11.5 V under load?
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