AutoCodes – Generic – C2101

C2101 Code - Battery Voltage High

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Battery Voltage. Common causes include Vehicle battery, Vehicle charging system, Faulty Anti-Lock Brake System (ABS) Module. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: C2101 indicates Battery Voltage High.
Common causes: Common causes include Vehicle battery, Vehicle charging system, Faulty Anti-Lock Brake System (ABS) Module.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 12,283

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code C2101 Description

The Anti-Lock Brake System (ABS) Module monitors the Battery Voltage. The ABS Module sets the OBDII code it detects system voltage is above 17 volts.

OBDII Code C2101 - Battery Voltage High - AutoCodes.com — C2101 Code - Battery Voltage High

What does this mean?

What are the Possible Causes of the DTC C2101?

Vehicle battery
Vehicle charging system
Faulty Anti-Lock Brake System (ABS) Module
Faulty Engine Control Module (ECM)

How to Fix the DTC C2101?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C2101 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C2101 code?

Need more information on how to fix the C2101 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C2101 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C2101 Chrysler — Battery Voltage High
C2101 Dodge — Battery Voltage High
C2101 Jeep — Battery Voltage High

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.