C0905 - Understanding DTC C0905: Common in 2015-2020 Toyota Camry and RAV4

Quick Answer

C0905 means: DTC C0905 means there's a communication error in the ABS system.

Fix: Check and replace faulty components Cost: $500 - $1,200 Time: 90-180 minutes

Can I drive with C0905? Address immediately to ensure safe braking performance.

Common Questions

What does C0905 mean and how does it affect my car?

DTC C0905 indicates a communication error in the ABS system, which can lead to compromised braking performance. If this code appears, it’s crucial to get your vehicle checked as it can affect safety, especially under slippery conditions.

What are the most common causes of C0905 and how much does it cost to fix?

Common causes of C0905 include a faulty ABS control module, corroded connectors, or electrical system issues. Repair costs can range from $100 for wiring repairs to over $1,200 for a complete module replacement.

Can I drive my car with C0905 or should I stop immediately?

It's not safe to drive with C0905 as it indicates potential ABS failure. Consider stopping immediately to prevent a possible loss of braking control.

How can I diagnose C0905 myself using GeekOBD APP?

Using the GeekOBD APP, you can retrieve diagnostic trouble codes, view live data, and check freeze frame data to understand the circumstances when C0905 triggered, helping you pinpoint the issue.

What vehicles are most commonly affected by C0905?

DTC C0905 is frequently experienced in 2015-2020 Toyota models like the Camry and RAV4, which have complex ABS systems that may be prone to communication errors.

How can I prevent C0905 from happening again?

Regularly inspect your vehicle's ABS system, ensure connections are clean and corrosion-free, and keep software updated to prevent issues that lead to DTC C0905.

What is C0905?

DTC C0905 is a diagnostic trouble code that indicates a problem within the vehicle's anti-lock braking system (ABS) or stability control system. Specifically, it refers to a communication error between the ABS control module and the vehicle's data bus. When this code appears, it often means that the ABS may not function correctly, which can compromise the vehicle's braking performance, especially in slippery conditions. This code is particularly common in vehicles like the 2015-2020 Toyota Camry and RAV4, where electronic systems rely heavily on proper communication between modules. If you see this code, it’s essential to address it promptly, as neglecting ABS issues can lead to decreased vehicle control and increased stopping distances. Symptoms often include the ABS warning light being illuminated on the dashboard, inconsistent braking performance, or even a complete loss of ABS functionality. In the real world, this can lead to safety concerns, especially during adverse weather conditions. Therefore, understanding DTC C0905 is critical for maintaining your vehicle's safety and reliability.

System: C - Chassis (ABS, Steering, Suspension)

Symptoms

Common symptoms when C0905 is present:

The ABS warning light stays illuminated on the dashboard, indicating a malfunction in the braking system.
Inconsistent braking performance may occur, such as the brakes feeling spongy or unresponsive during application.
The vehicle may experience longer stopping distances, especially on wet or slippery surfaces, due to potential ABS failure.
You might notice that the traction control system is disabled, leading to reduced vehicle stability in challenging driving conditions.
Unusual noises from the brakes, such as grinding or squeaking, could accompany the warning light.

Possible Causes

Most common causes of C0905 (ordered by frequency):

{'cause': 'Faulty ABS control module or wiring harness (70%)', 'details': "The most common issue leading to DTC C0905 is a malfunctioning ABS control module or damaged wiring. This can disrupt the communication between the ABS and the vehicle's computer systems."}
{'cause': 'Corroded connectors or poor ground connections (15%)', 'details': 'Over time, connectors can corrode, especially in climates with road salt exposure, which can lead to intermittent communication failures.'}
{'cause': 'Software glitches in the ABS module (10%)', 'details': 'Rarely, software bugs or outdated firmware in the ABS module can lead to communication errors. Updating the software may resolve the issue.'}
{'cause': 'Electrical system issues (3%)', 'details': 'Problems with the vehicle’s overall electrical system, such as a failing battery or alternator, can affect the ABS functions and trigger this code.'}
{'cause': 'Damaged ABS sensors (2%)', 'details': 'If the wheel speed sensors are damaged or malfunctioning, they may send incorrect data to the ABS module, leading to communication errors.'}

C0905 Repair Costs

Cost Breakdown by Repair Type

ABS Control Module Replacement

Replacing the faulty ABS control module can resolve communication issues and restore proper braking function.

Total: $500 - $1,200
Success rate: 90%

Wiring Repair

Repairing or replacing damaged wiring can restore communication between the ABS and the vehicle's computer.

Total: $100 - $300
Success rate: 85%

Software Update

Updating the ABS module software may fix minor glitches leading to DTC C0905.

Total: $50 - $150
Success rate: 70%

Money-Saving Tips for C0905

Start with the most common and least expensive repairs first
Use GeekOBD APP to confirm diagnosis before replacing expensive parts
Consider preventive maintenance to avoid future occurrences
Compare prices for OEM vs aftermarket parts based on your needs
Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional C0905 Diagnosis Process

Follow these systematic steps to accurately diagnose C0905. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Look for obvious signs such as damaged wiring, loose connectors, or corrosion around the ABS module (5-10 minutes)

Step 1: Initial visual inspection - Look for obvious signs such as damaged wiring, loose connectors, or corrosion around the ABS module (5-10 minutes).