C0300

ABS/EBCM Internal Fault

Severity: High ABS/Chassis Control Generic OBD-II Code Est. Repair: $400 - $1,500

High severity. Avoid long drives and get diagnosed as soon as possible. Flashing check engine light = stop driving if safe.

Quick Answer

C0300 means “ABS/EBCM Internal Fault.” Severity: High. Estimated repair cost: $400 - $1,500. Most common sign: ABS and often brake warning lights.

What Does C0300 Mean?

The ABS module itself has flagged an internal fault.

Common Symptoms

ABS and often brake warning lights
ABS inoperative

Possible Causes

Internal module hardware failure
Water/heat damage to the module

How to Fix C0300 – Repair Guide

Confirm with scan tool that no external wiring issues are the actual cause first
Replace ABS module if internal fault is confirmed
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Budgeting for This Repair?

A typical C0300 repair runs about $400 - $1,500. If you'd rather spread the cost over time, estimate the payment with our free sister tool: Car Finance Calculator (50-state sales tax, trade-in equity, full amortization).

Recommended OBD2 Scanners & Tools

To read and clear this code yourself, you need a reliable OBD2 scanner. Here are top-rated options:

BlueDriver Bluetooth Pro OBDII Scan Tool

Professional Bluetooth scanner with live data, enhanced diagnostics (ABS/SRS) and repair reports. Works with iPhone & Android. No subscription fee.

$70 - $120
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ANCEL AD310 Classic Enhanced OBD2 Scanner

Best-selling handheld code reader. Read & clear engine codes, live data, freeze frame. No phone required. Highly rated for beginners.

$25 - $40
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FIXD Bluetooth OBD2 Scanner

Simple plug-and-play sensor that explains codes in plain English via free app. Ideal for first-time users.

$35 - $60
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Disclaimer: Information is for educational reference only and does not replace professional diagnosis. Actual causes and costs vary by vehicle make, model, year and condition. Always verify with a qualified technician.