C044B - Understanding the Trailer Brake Control Module Error in Common Vehicles Like Ford and Chevrolet

Quick Answer

C044B means: C044B refers to a malfunction in the trailer brake control module circuit.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with C044B? Immediate attention is recommended to ensure safe towing.

Common Questions

What does C044B mean and how does it affect my car?

C044B indicates an issue with the trailer brake control module, which affects your ability to brake a trailer safely. If this code appears, your vehicle may not respond as expected when towing, which could lead to accidents.

What are the most common causes of C044B and how much does it cost to fix?

Common causes include a faulty trailer brake control module or wiring issues. Repair costs can range from $150 to $300 depending on the required repairs.

Can I drive my car with C044B or should I stop immediately?

It's best to avoid towing if C044B is present, as this can lead to unsafe braking conditions. Have the issue diagnosed as soon as possible.

How can I diagnose C044B myself using GeekOBD APP?

Use the GeekOBD APP to scan for DTCs and review freeze frame data. Check the trailer brake control module and associated wiring for faults.

What vehicles are most commonly affected by C044B?

C044B is frequently found in vehicles like the 2013-2018 Ford F-150 and 2014-2019 Chevrolet Silverado, especially those used for towing.

How can I prevent C044B from happening again?

Regularly inspect your trailer brake wiring and connectors for corrosion or damage. Schedule routine maintenance to ensure all components are functioning correctly.

What is C044B?

The Diagnostic Trouble Code (DTC) C044B indicates an issue with the trailer brake control module circuit. When this code is triggered, it usually signifies that the power or ground circuits for the trailer brake controller are not functioning properly. This can lead to various issues when towing, including an inability to control the trailer brakes effectively. The code is commonly seen in vehicles such as the 2013-2018 Ford F-150 and 2014-2019 Chevrolet Silverado. When C044B is present, the vehicle might experience problems such as irregular braking behavior when a trailer is attached, which can be dangerous. Drivers may notice that the trailer brakes do not engage or disengage as expected, which can lead to unsafe towing conditions. Additionally, the vehicle might alert the driver with a warning light, prompting immediate attention. Addressing this code is essential for safe towing, as it directly affects the functionality of the trailer braking system. Ignoring the C044B code can result in further electrical issues or even damage to the brake system, leading to costly repairs down the line. Therefore, vehicle owners should prioritize checking this code and addressing any underlying issues promptly.

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

Symptoms

Common symptoms when C044B is present:

  • Check engine light stays on constantly, indicating a persistent issue with the trailer brake system.
  • Inconsistent braking response when towing, leading to potential safety hazards.
  • Trailer brakes do not activate when the brake pedal is pressed, resulting in decreased control over the trailer.
  • Strange noises from the trailer brake system when in use, which may indicate electrical problems.
  • Increased wear on brake components due to improper braking behavior.

Possible Causes

Most common causes of C044B (ordered by frequency):

  1. Faulty trailer brake control module - Likelihood: 40%. This is the most common reason for the C044B code, where the module itself may be malfunctioning.
  2. Damaged wiring or connectors in the trailer brake system - Likelihood: 30%. Corrosion or physical damage can interrupt the electrical signals.
  3. Poor ground connections - Likelihood: 20%. Grounding issues can lead to insufficient power reaching the brake module.
  4. Failed trailer brake relay - Likelihood: 5%. This relay can fail due to wear and tear, affecting the entire brake system.
  5. Short circuits in the trailer wiring - Likelihood: 5%. Rare but can cause significant issues if not addressed.

C044B Repair Costs

Cost Breakdown by Repair Type

Replace Trailer Brake Control Module

Replacing the faulty module with a new OEM part to restore proper braking functionality.

  • Total: $150 - $300
  • Success rate: 90%
Money-Saving Tips for C044B
  • 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 C044B Diagnosis Process

Follow these systematic steps to accurately diagnose C044B. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, 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: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve 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: Component testing - Use a multimeter to test voltage and ground at the trailer brake control module (20-30 minutes)

Step 3: Component testing - Use a multimeter to test voltage and ground at the trailer brake control module (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: Check for continuity in wiring - Verify that there are no breaks in the wiring harness leading to the trailer brake module (15-20 minutes)

Step 4: Check for continuity in wiring - Verify that there are no breaks in the wiring harness leading to the trailer brake module (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.
Step 5: Step 5: System function test - After repairs, ensure the trailer brake system works correctly by conducting a function test (10-15 minutes)

Step 5: System function test - After repairs, ensure the trailer brake system works correctly by conducting a function test (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.

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: Ford F-150 C044B Repair Case

Vehicle: 2016 Ford F-150, 60,000 miles

Problem: Customer reported that the trailer brakes were not engaging when the pedal was pressed, causing safety concerns while towing.

Diagnosis: Diagnostic tests revealed a C044B code, indicating a malfunction in the trailer brake control module. A visual inspection showed damaged wiring.

Solution: Replaced the trailer brake control module and repaired the damaged wiring.

Cost: $250 (parts: $150 for the module, $100 for wiring repairs)

Result: After the repair, the customer confirmed that the trailer brakes functioned properly during towing.

Case Study 2: Chevrolet Silverado C044B Diagnosis and Repair

Vehicle: 2017 Chevrolet Silverado 1500, 45,000 miles

Problem: Owner experienced intermittent trailer brake failures, leading to erratic braking behavior with a trailer attached.

Diagnosis: OBD2 scan revealed the C044B code. Further testing showed a poor ground connection affecting the trailer brake control module.

Solution: Cleaned and re-established ground connections, and replaced a corroded connector.

Cost: $180 (parts: $30 for connectors, $150 for labor)

Result: Post-repair testing showed consistent and reliable trailer brake operation.

Diagnose C044B

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: C044B
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes