C1246 - DTC C1246 - Understanding the ABS Malfunction in 2005-2010 Toyota Tacoma and Other Models

Quick Answer

C1246 means: DTC C1246 indicates a malfunction in the ABS control module's internal circuit.

Fix: Check and replace faulty components Cost: $800 - $1,200 Time: 90-180 minutes

Can I drive with C1246? Immediate attention is required to ensure safe braking performance.

Common Questions

What does C1246 mean and how does it affect my car?

C1246 indicates a malfunction in your vehicle's ABS control module. This can lead to reduced braking performance, especially under slippery conditions, making it critical to address promptly.

What are the most common causes of C1246 and how much does it cost to fix?

Common causes include a faulty ABS control module, wiring issues, and wheel speed sensor failures. Repair costs can range from $100 for wiring repairs to $1,200 for a complete module replacement.

Can I drive my car with C1246 or should I stop immediately?

It's advisable to stop driving and have your vehicle inspected as the ABS system may not function properly, increasing the risk of accidents.

How can I diagnose C1246 myself using GeekOBD APP?

Connect the GeekOBD APP to your vehicle's OBD2 port to read the DTCs, view freeze frame data, and monitor live sensor data to pinpoint the problem.

What vehicles are most commonly affected by C1246?

Commonly affected models include the 2005-2010 Toyota Tacoma, 2007-2015 Toyota Tundra, and 2008-2014 Toyota Highlander.

How can I prevent C1246 from happening again?

Regular maintenance checks on your ABS system, including inspections of wiring and sensors, can help prevent issues that may trigger the C1246 code.

What is C1246?

DTC C1246 is a diagnostic trouble code that indicates a malfunction within the Anti-lock Braking System (ABS) of a vehicle. Specifically, it refers to an issue with the ABS control module's internal circuit. This code is often seen in vehicles such as the 2005-2010 Toyota Tacoma, 2007-2015 Toyota Tundra, and 2008-2014 Toyota Highlander. When this code is triggered, it typically signifies that the ABS system is unable to properly communicate with the vehicle's Engine Control Module (ECM) or that there are issues with the wheel speed sensors that monitor the rotation of each wheel. Ignoring this code can lead to decreased braking performance, especially in slippery conditions, and may prevent the ABS from functioning correctly, increasing the risk of skidding or loss of control during hard braking. It's crucial for vehicle owners to address this issue promptly to ensure the safety and reliability of their braking system.

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

Symptoms

Common symptoms when C1246 is present:

The ABS warning light remains illuminated on the dashboard, indicating a malfunction in the ABS system.
Driver experiences decreased braking performance, particularly on wet or slippery roads, which can lead to skidding.
There is an inconsistency in brake pedal feel, with the pedal feeling either too soft or too hard during braking.
Unusual noises may emanate from the ABS module, such as clicking or buzzing during operation.
The vehicle may exhibit erratic behavior during braking, such as rapid cycling of the ABS system, especially when driving on uneven surfaces.

Possible Causes

Most common causes of C1246 (ordered by frequency):

{'cause': 'Faulty ABS control module - 40% likelihood. Over time, the ABS control module can develop internal faults due to wear and tear or electrical issues.', 'details': 'This can lead to improper functionality and trigger the C1246 code.'}
{'cause': 'Wiring issues - 30% likelihood. Damaged or corroded wiring connections between the ABS module and the wheel speed sensors can disrupt communication.', 'details': 'Visual inspections and using a multimeter can help identify these issues.'}
{'cause': 'Wheel speed sensor failure - 20% likelihood. Sensors that monitor wheel rotation may fail or send inaccurate readings.', 'prevention': 'Regular maintenance and checks can help catch these failures before they lead to DTCs.'}
{'cause': "Software glitch - 5% likelihood. Occasionally, the vehicle's software may require an update or recalibration.", 'details': 'This is sometimes overlooked but can be fixed with a simple software update at the dealership.'}
{'cause': 'Mechanical issues in the braking system - 5% likelihood. Problems like worn-out brake pads or malfunctioning brake calipers can indirectly lead to ABS problems.', 'details': 'Regular brake inspections can help prevent these issues.'}

C1246 Repair Costs

Cost Breakdown by Repair Type

ABS Control Module Replacement

Replacing a faulty ABS control module may be necessary if diagnostics confirm it as the issue.

Total: $800 - $1,200
Success rate: 95%

Wiring Repair

Repairing damaged wiring or connectors can resolve communication issues without needing to replace the entire module.

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

Wheel Speed Sensor Replacement

If the wheel speed sensor is faulty, replacing it can restore proper ABS functionality.

Total: $150 - $400
Success rate: 90%

Money-Saving Tips for C1246

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 C1246 Diagnosis Process

Follow these systematic steps to accurately diagnose C1246. Each step builds on the previous one to ensure accurate diagnosis.