C0104 - DTC C0104 - Understanding the ABS Wheel Speed Sensor Fault in Many 2000-2020 Chevrolet and GMC Models

Quick Answer

C0104 means: C0104 indicates a fault with the ABS wheel speed sensor circuit.

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

Can I drive with C0104? You should address this code immediately to ensure safe braking performance.

Common Questions

What does C0104 mean and how does it affect my car?

C0104 indicates a fault in the ABS wheel speed sensor circuit, which can severely affect your vehicle's braking performance. If the ABS is not functioning correctly, you may experience longer stopping distances and a higher risk of skidding, especially in adverse weather conditions.

What are the most common causes of C0104 and how much does it cost to fix?

The most typical cause is a damaged wheel speed sensor, which can cost between $100 to $300 to replace. Other causes include wiring issues and ABS control module failures, which can be pricier, ranging from $400 to $800.

Can I drive my car with C0104 or should I stop immediately?

While you might be able to drive with C0104, it's highly advised to address the issue immediately. Driving without a functioning ABS can be dangerous, particularly in wet or slippery conditions.

How can I diagnose C0104 myself using GeekOBD APP?

Using the GeekOBD APP, start by scanning for trouble codes. Check the freeze frame data for any unusual readings and inspect the wheel speed sensor and wiring. Follow the diagnostic steps outlined in your vehicle's service manual for more detailed guidance.

What vehicles are most commonly affected by C0104?

Commonly affected vehicles include the 2003-2010 Chevrolet Silverado, 2007-2014 GMC Sierra, and various other Chevrolet and GMC models produced between 2000 and 2020.

How can I prevent C0104 from happening again?

Regular maintenance checks, including inspecting the ABS system and wheel speed sensors for wear and tear, can help prevent future occurrences. Additionally, avoid driving over rough terrain to minimize damage to the sensors.

What is C0104?

The DTC C0104 code is associated with the Anti-lock Braking System (ABS) and indicates a fault with the wheel speed sensor circuit. Specifically, this code suggests that the ABS control module has detected a malfunction in the signal from one of the wheel speed sensors, which are critical for the proper functioning of the ABS system. When the ABS system detects an issue, it can compromise the vehicle's braking performance, especially in slippery conditions, potentially leading to reduced vehicle control. The code primarily affects vehicles like the 2003-2010 Chevrolet Silverado or the 2007-2014 GMC Sierra, among others. This malfunction can result from various factors, including damaged wiring, a faulty wheel speed sensor, or issues with the ABS control module itself. Ignoring this trouble code can lead to decreased safety as the ABS may not engage correctly, increasing the risk of skidding during hard braking. Therefore, it's essential to address this issue promptly by performing a thorough diagnostic evaluation.

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

Symptoms

Common symptoms when C0104 is present:

The ABS warning light stays illuminated on the dashboard, indicating a persistent issue with the braking system.
You may experience a loss of ABS functionality, where the brakes lock up during sudden stops, especially on icy or wet surfaces.
There may be noticeable changes in braking performance, such as longer stopping distances or a spongy brake pedal feel.
Potential traction control issues, where the traction control system may not function correctly due to the faulty sensor.
In some cases, you might hear unusual noises from the ABS pump when the vehicle is starting or stopping.

Possible Causes

Most common causes of C0104 (ordered by frequency):

The most common cause is a damaged wheel speed sensor, which accounts for approximately 60% of C0104 cases. This can happen due to exposure to road debris or corrosion.
Another significant cause is damaged wiring or connectors in the ABS system, which can lead to a weak or interrupted signal to the ABS control module.
Less frequently, a malfunctioning ABS control module can trigger this code, though this is a more complex and expensive issue to diagnose and repair.
In rare cases, a faulty ESC (Electronic Stability Control) sensor can contribute to this problem, affecting how the ABS system interacts with other stability systems.
Environmental factors, such as extreme temperatures or moisture, can also contribute to failures in the wheel speed sensor circuit.

C0104 Repair Costs

Cost Breakdown by Repair Type

Wheel Speed Sensor Replacement

Replacing the faulty wheel speed sensor is often the most straightforward repair.

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

ABS Control Module Replacement

In cases where the control module is faulty, this replacement is necessary.

Total: $400 - $800
Success rate: 90%

Money-Saving Tips for C0104

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 C0104 Diagnosis Process

Follow these systematic steps to accurately diagnose C0104. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for signs of damage to the wheel speed sensor and wiring harness, such as frayed wires or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for signs of damage to the wheel speed sensor and wiring harness, such as frayed wires or corrosion (5-10 minutes).