C1241ABS / Electrical

Low Battery Positive Voltage (ABS)

C1241 indicates the ABS module detected low battery positive voltage, common on Toyota systems. Voltage below the acceptable range causes the module to disable ABS and traction control.

🚗 Yes, but low voltage disables ABS, so test the battery and charging system.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Weak battery$120-$300

35%

An aging or discharged battery causes low voltage.

#2Charging system fault$150-$600

30%

A failing alternator does not maintain voltage.

#3Poor power or ground connection$20-$250

25%

Corroded terminals cause a voltage drop at the module.

#4Module power wiring fault$50-$300

10%

Damaged power feed wiring to the ABS module.

🩺 Common Symptoms

ABS and traction control lights on
Dim or flickering lights
Hard starting
Multiple electrical codes stored

💰 Repair Cost: DIY vs Shop

DIY Cost

$20-$300

Shop Cost

$100-$600

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose C1241

1Load-test the battery and check the state of charge

2Test alternator output at idle and under load

3Clean and tighten battery terminals and grounds

4Check the ABS module power feed

❓ Frequently Asked Questions

Can I drive with C1241?

Yes, but ABS is disabled and the battery may leave you stranded, so test the battery and charging system soon.

How much to fix C1241?

Often just a battery or connection repair, from about $20 up to a few hundred dollars.

What causes C1241 most often?

A weak battery, a failing alternator, or corroded power and ground connections.

🔗 Related Codes

C1223C1256C0800C1214