C0124 - Understanding DTC C0124: What It Means for Your 2010-2018 Chevrolet Equinox and Other Models

Quick Answer

C0124 means: C0124 indicates a malfunction in the ABS system, often linked to wheel speed sensors.

Fix: Check and replace faulty components Cost: $100 - $300 Time: 90-180 minutes

Can I drive with C0124? Immediate attention is recommended to ensure safe braking performance.

Common Questions

What does C0124 mean and how does it affect my car?

The C0124 code indicates a malfunction in your vehicle's Anti-lock Brake System (ABS). This could lead to reduced braking performance, especially in emergency situations. It’s essential to have it checked as it can compromise your safety on the road.

What are the most common causes of C0124 and how much does it cost to fix?

Common causes include faulty wheel speed sensors, malfunctioning ABS control modules, and damaged wiring. Repair costs can range from $100 for a sensor replacement to over $1,200 for a full control module replacement, depending on the severity and parts required.

Can I drive my car with C0124 or should I stop immediately?

While you can technically drive with C0124, it is not advisable. The ABS may not function correctly, increasing the risk of skidding or losing control, especially in adverse weather conditions. It's best to address this issue as soon as possible.

How can I diagnose C0124 myself using GeekOBD APP?

You can use the GeekOBD APP to scan your vehicle for codes. Once you retrieve the C0124 code, inspect the ABS wiring and connectors for damage. The app can also help you monitor real-time data from the wheel speed sensors.

What vehicles are most commonly affected by C0124?

C0124 is frequently found in vehicles such as the 2010-2018 Chevrolet Equinox, 2010-2018 GMC Terrain, and Cadillac SRX. These models have known issues with their ABS systems, making them susceptible to this code.

How can I prevent C0124 from happening again?

Regular maintenance checks on your ABS system, including inspecting the wiring and connectors, can help prevent C0124. Keeping your vehicle clean and free from road debris can also reduce the risk of sensor damage.

What is C0124?

The Diagnostic Trouble Code (DTC) C0124 indicates an issue with the Anti-lock Brake System (ABS) and is often related to the wheel speed sensors or the ABS control module. When this code is triggered, it signifies that the ABS system has detected a malfunction, which can lead to a loss of the ABS function. This means that while your brakes will still work, you may not have the added safety features of ABS during emergency braking situations. It's crucial to address this code promptly since it can affect your vehicle's braking performance, especially in slippery conditions. Car owners should be aware that this issue is not just a minor inconvenience; it poses a safety risk to both the driver and passengers. The C0124 code is particularly common in models like the 2010-2018 Chevrolet Equinox and other GM vehicles, including the GMC Terrain and Cadillac SRX. If left unaddressed, the malfunction can lead to increased stopping distances and reduced vehicle control, particularly when driving on wet or icy roads. Therefore, understanding the implications of this code and acting swiftly is essential for maintaining vehicle safety and performance.

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

Symptoms

Common symptoms when C0124 is present:

  • The ABS warning light illuminates on the dashboard, indicating a problem with the anti-lock brake system.
  • The brake pedal feels different during emergency stops, and the vehicle may skid more easily due to a lack of ABS functionality.
  • You may notice a decrease in overall braking performance, particularly on wet or slippery roads, making it harder to stop quickly.
  • In some cases, you may hear unusual noises coming from the brake system, such as grinding or popping sounds when braking.
  • There may also be a noticeable increase in stopping distances, which can be alarming during abrupt stops.

Possible Causes

Most common causes of C0124 (ordered by frequency):

  1. The most common cause of C0124 is a malfunctioning wheel speed sensor, which can occur in up to 60% of cases due to wear and tear or exposure to road debris.
  2. Another prevalent cause is a faulty ABS control module, which may fail due to electrical issues or internal component wear, accounting for about 25% of cases.
  3. Corroded wiring or poor connections in the ABS system can also trigger this code, often preventable with regular inspections and maintenance.
  4. Less commonly, a failing brake hydraulic unit may cause C0124, which can be a serious issue requiring immediate attention.
  5. In rare instances, software glitches in the vehicle's computer system can lead to false readings, triggering the C0124 code without a physical defect.

C0124 Repair Costs

Cost Breakdown by Repair Type

Wheel Speed Sensor Replacement

Replacing a faulty wheel speed sensor is often the first line of repair for C0124.

  • Total: $100 - $300
  • Success rate: 85%
ABS Control Module Repair/Replacement

Repairing or replacing the ABS control module may be necessary if the problem persists after sensor replacement.

  • Total: $300 - $1,200
  • Success rate: 75%
Wiring Harness Repair

Repairing corroded or damaged wiring can resolve the issue if it is the root cause.

  • Total: $50 - $150
  • Success rate: 90%
Money-Saving Tips for C0124
  • 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 C0124 Diagnosis Process

Follow these systematic steps to accurately diagnose C0124. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection of the ABS wiring and connectors for any signs of damage or corrosion (5-10 minutes)

Step 1: Conduct an initial visual inspection of the ABS wiring and connectors for any signs of damage or corrosion (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: Use the GeekOBD APP to perform an OBD2 scan, retrieving all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan, retrieving all codes and freeze frame data to understand the fault context (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Test the wheel speed sensors with a multimeter to check for proper voltage and continuity, as these are often the culprits (20-30 minutes)

Step 3: Test the wheel speed sensors with a multimeter to check for proper voltage and continuity, as these are often the culprits (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: If necessary, perform a function test on the ABS control module to confirm it is operating correctly (10-15 minutes)

Step 4: If necessary, perform a function test on the ABS control module to confirm it is operating correctly (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: After repairs, clear the codes with the GeekOBD APP and conduct a road test to ensure the ABS system is functioning as expected (15-20 minutes)

Step 5: After repairs, clear the codes with the GeekOBD APP and conduct a road test to ensure the ABS system is functioning as expected (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Chevrolet Equinox ABS Sensor Replacement

Vehicle: 2015 Chevrolet Equinox, 75,000 miles

Problem: Customer reported ABS light on the dashboard and unusual braking issues.

Diagnosis: A diagnostic scan revealed the C0124 code. A visual inspection showed a worn wheel speed sensor.

Solution: Replaced the faulty wheel speed sensor and cleared the codes.

Cost: $150 (sensor cost: $100, labor: $50)

Result: After the repair, the ABS light was off, and the braking performance returned to normal.

Case Study 2: GMC Terrain ABS Module Replacement

Vehicle: 2013 GMC Terrain, 90,000 miles

Problem: Customer experienced loss of ABS functionality and felt the brakes locking during stops.

Diagnosis: C0124 was diagnosed, indicating an issue with the ABS control module after testing the sensors.

Solution: Replaced the ABS control module and reprogrammed the system.

Cost: $1,000 (module cost: $800, labor: $200)

Result: Post-repair, the ABS system functioned normally, and the customer reported improved braking.

Diagnose C0124

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: C0124
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes