C1A44 - Understanding the Trailer Brake Control Circuit Issue in 2016-2020 Ford F-150

Quick Answer

C1A44 means: C1A44 refers to a malfunction in the trailer brake control circuit.

Fix: Check and replace faulty components Cost: $200 - $600 Time: 90-180 minutes

Can I drive with C1A44? It's crucial to diagnose and repair this issue immediately to ensure safe towing.

Common Questions

What does C1A44 mean and how does it affect my car?

C1A44 indicates a malfunction in the trailer brake control system, affecting your ability to tow safely. If ignored, it can lead to braking issues that could compromise safety while towing.

What are the most common causes of C1A44 and how much does it cost to fix?

Common causes include a faulty trailer brake control module, damaged wiring, and corroded connectors. Repair costs can range from $100 for wiring repairs to $600 for module replacement.

Can I drive my car with C1A44 or should I stop immediately?

While you may still drive the vehicle, it's advised to refrain from towing until the issue is resolved to ensure safety and prevent further damage.

How can I diagnose C1A44 myself using GeekOBD APP?

Using the GeekOBD APP, you can scan for DTCs, view freeze frame data, and monitor trailer brake signals to identify the fault. Check for voltage at the control module and inspect connections for corrosion.

What vehicles are most commonly affected by C1A44?

The C1A44 code is frequently seen in the 2016-2020 Ford F-150 models, particularly those equipped with integrated trailer braking systems.

How can I prevent C1A44 from happening again?

Regularly inspect the trailer brake connections and wiring for wear or corrosion. Ensure software updates are performed during routine maintenance to minimize software-related issues.

What is C1A44?

The diagnostic trouble code (DTC) C1A44 indicates a problem with the trailer brake control circuit, specifically that the brake control module has detected an issue. This code is most commonly associated with newer vehicles such as the 2016-2020 Ford F-150 that are equipped with integrated trailer brake systems. When this code occurs, it typically means that the system's ability to control trailer brakes is compromised. In practical terms, this issue can lead to suboptimal braking performance when towing, which can be dangerous. It's essential to address this issue promptly to prevent potential brake failure, which could result in accidents or increased wear on your vehicle's braking system. If you see this code, you may also notice warning lights on your dashboard, and towing a trailer could become more challenging. In some cases, the vehicle may enter a fail-safe mode where certain features are disabled to ensure safety. This code not only affects towing capability but can also impact the overall driving experience, especially if you frequently haul heavy loads.

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

Symptoms

Common symptoms when C1A44 is present:

  • Check engine light stays illuminated, indicating a persistent fault in the braking system.
  • Increased stopping distance when towing a trailer, leading to potential safety hazards.
  • Towing capacity may be reduced, causing limitations when hauling heavy loads.
  • Inconsistent brake response when trailer brakes are engaged, making it harder to control the vehicle.
  • Possible audible alerts or warning messages displayed in the dashboard related to trailer braking.

Possible Causes

Most common causes of C1A44 (ordered by frequency):

  1. The most common cause is a faulty trailer brake control module, with a likelihood of about 60%. If this module is malfunctioning, it cannot effectively communicate with the brake system.
  2. A short circuit or damaged wiring in the trailer brake harness is another frequent issue, possibly accounting for 25% of cases. Inspecting the wiring for any visible signs of wear or damage is crucial.
  3. Corrosion at the electrical connectors can also cause this code, with a likelihood of around 10%. Regular maintenance and clean connections can prevent this issue.
  4. Less common, but serious, is a malfunction in the vehicle's main control module, which could lead to broader electrical system failures.
  5. A rare cause could be software glitches in the vehicle's control system. Updating the vehicle's software might resolve this issue.

C1A44 Repair Costs

Cost Breakdown by Repair Type

Replace Trailer Brake Control Module

Replacing the faulty trailer brake control module to restore proper function.

  • Total: $200 - $600
  • Success rate: 95%
Repair Wiring Harness

Repairing any damaged wiring or connectors to ensure proper electrical flow.

  • Total: $100 - $300
  • Success rate: 85%
Software Update

Updating the vehicle's software if a glitch is causing the issue.

  • Total: $50 - $150
  • Success rate: 70%
Money-Saving Tips for C1A44
  • 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 C1A44 Diagnosis Process

Follow these systematic steps to accurately diagnose C1A44. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Conduct an initial visual inspection, looking for damaged wiring, loose connections, or corrosion in the trailer brake control circuit (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: 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: Test the trailer brake control module using a multimeter to check voltage and ground connections (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: Conduct a system function test to verify the operation of the trailer brake system after addressing any issues (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: Perform a road test under various conditions to confirm that the repair was successful and no codes return (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: Trailer Brake Control Module Replacement in 2018 Ford F-150

Vehicle: 2018 Ford F-150, 45,000 miles

Problem: Customer reported the check engine light and difficulties with trailer brakes.

Diagnosis: Diagnostic scan revealed DTC C1A44. Visual inspection showed corrosion at the control module connector.

Solution: Replaced the trailer brake control module and cleaned connectors.

Cost: $480 (parts: $400, labor: $80)

Result: Customer reported successful towing operation with no further issues.

Case Study 2: Wiring Harness Repair in 2019 Ford F-150

Vehicle: 2019 Ford F-150, 30,000 miles

Problem: Check engine light illuminated with a warning about trailer brakes.

Diagnosis: OBD2 scan confirmed C1A44. Inspection revealed damaged wiring in the harness.

Solution: Repaired wiring and secured connections.

Cost: $150 (parts: $50, labor: $100)

Result: Issue resolved, with successful towing performance afterward.

Diagnose C1A44

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: C1A44
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes