C1300: ABS / skid control ECU malfunction (Toyota)

Toyota C1300 skid control ECU

Severity: Stop — don't drive this car

Prius owners reported red brake warnings with the emergency brake the only braking and a dealer quoting an ECU replacement; the code is a module fault in a brake system.

Safety-critical system: explanation only, no DIY steps. Source: how we rate severity

Need a tow? Find one near you

C1300 in short

On Toyota, C1300 means the ABS skid control computer has a malfunction. On Prius, owners report red brake warnings and loss of normal braking, and a Camry owner was told to see the dealer. Treat it as a brake system fault and have it checked before driving much.

The skid control ECU runs ABS, traction and stability and on hybrids part of the brake control. C1300 flags a fault in that computer.

Prius owners report it with C1247 (stroke sensor) and C2318 (low voltage); resetting once cleared the warnings. A Camry owner saw a dealer suggest a battery first.

Pick your make

C1300 is a manufacturer-specific code: its meaning depends on who built the car.

Other makes: meaning not verified. Check with a scan tool that reads manufacturer definitions.

C1300 on Toyota

Most likely causes

Cause 1: Skid control ECU
Supported by vehicle data
Why it ranks here
Dealers recommended replacing the ECU on a Prius.
What would change this
Rises if code returns after clearing.
How to test the brake system control module (abs module)
Cause 2: Low supply voltage
Possible — needs testing
Why it ranks here
A Prius log shows C2318 low voltage with C1300 and a reset cleared it.
What would change this
Rises if battery weak.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

Step 1: Read all brake codes including C2318.
Best left to a shopTool: scan tool that reads ABS codes
Warning:Brake system faults need a shop.
- IfC2318 also stored
  It meansCheck voltage.
  Points to: Low supply voltage
- IfC1300 alone
  It meansDealer module check.
  Points to: Skid control ECU

Symptoms

ABS, brake and VSC lights on
Red brake warning with reduced brake assist Gets more serious: stop and have it checked.

How to fix

We don't give DIY repair steps for a Stop code. Get the car inspected before you drive it; the tests above help you understand what a technician will check.

Parts and cost context

Brake system control module (ABS module):Labour varies; get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Toyota

2005–2008 · Prius
Supported by vehicle data
Owners report C1300 with red brake warnings. Based on complaints.
2019 · Camry
Supported by vehicle data
A Camry owner reports C1300 as skid control ECU malfunction.

No curated relationships for C1300 yet.

All ABS, traction and stability control codes

Sources and review

NHTSA complaint ODI 10489082: 2008 Toyota Prius, C1247 C1300 C2318 — NHTSA Office of Defects Investigation
NHTSA complaint ODI 10485951: 2005 Toyota Prius, C1300 — NHTSA Office of Defects Investigation
NHTSA complaint ODI 11549108: 2019 Toyota Camry, C1300 — NHTSA Office of Defects Investigation

Last reviewed: October 16, 2026
Written by: Saurabh K.
Editorial review: Pending
Technician review: Technician review pending

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error

Severity: Stop — don't drive this car

Pick your make

Most likely causes

Cause 1: Skid control ECU

Cause 2: Low supply voltage