U0112 - Understanding DTC U0112: Communication Loss with Anti-Lock Brake System (Common in 2011-2018 Ford F-150)

Quick Answer

U0112 means: DTC U0112 denotes a communication failure between the ECM and the ABS module.

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

Can I drive with U0112? Immediate attention is recommended to ensure safe vehicle operation.

Common Questions

What does U0112 mean and how does it affect my car?

DTC U0112 indicates a loss of communication between the Engine Control Module (ECM) and the ABS module. This can affect your car's braking performance, potentially leading to safety issues, especially in adverse conditions. If this code appears, it's crucial to address it promptly to maintain vehicle safety and performance.

What are the most common causes of U0112 and how much does it cost to fix?

The most common causes of U0112 include damaged wiring or connections, which account for about 60% of cases. Repairing wiring can cost between $150 - $300. Other causes include a faulty ABS module or ECM, with replacement costs ranging from $500 to $1,200. Addressing these issues quickly can save you money and maintain vehicle safety.

Can I drive my car with U0112 or should I stop immediately?

While you might be able to drive your vehicle with DTC U0112, it's not recommended. This code indicates potential braking system failures, which could lead to dangerous situations, especially in emergencies. It's advisable to have your vehicle checked as soon as possible.

How can I diagnose U0112 myself using GeekOBD APP?

To diagnose U0112 using the GeekOBD APP, first connect the app to your vehicle's OBD2 port. Run a full diagnostic scan to retrieve codes and freeze frame data. Pay close attention to any additional codes that may provide context for U0112. Check for wiring issues or module faults as indicated in the app's analysis.

What vehicles are most commonly affected by U0112?

DTC U0112 is frequently seen in various Ford models, particularly the F-150 from 2011 to 2018. Other vehicles may also experience this code, including certain Chevrolet and GMC models. Always check for any recalls or Technical Service Bulletins (TSBs) related to your specific vehicle.

How can I prevent U0112 from happening again?

Regular maintenance is key to preventing DTC U0112. Ensure that your vehicle's wiring and connectors are inspected during routine service. Keep the ABS module clean and free of debris, and consider using protective coatings on exposed wiring to protect against corrosion. Regularly updating your vehicle's software can also help prevent communication errors.

What is U0112?

DTC U0112 indicates a communication issue between your vehicle's Engine Control Module (ECM) and the Anti-Lock Brake System (ABS) module. This code is often triggered when the ECM fails to receive expected messages from the ABS module, indicating a potential fault in the communication lines or the modules themselves. This code can lead to serious implications for vehicle safety, as it may cause the ABS to become inoperative. In real-world scenarios, you might notice the ABS warning light illuminating on your dashboard, which serves as an alert to drivers that there's a malfunction within the braking system. Ignoring this code can lead to decreased braking performance, especially during slippery conditions, as the ABS system is crucial for maintaining control. If left unaddressed, this issue can escalate, leading to costly repairs and potentially compromising the safety of the vehicle. Therefore, understanding DTC U0112 is essential for both immediate corrections and long-term vehicle maintenance strategies.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0112 is present:

  • The ABS warning light is illuminated on the dashboard, indicating a malfunction in the anti-lock braking system.
  • The vehicle may experience reduced braking performance, especially in wet or slippery conditions, leading to potential safety hazards.
  • Drivers might notice inconsistent brake pedal feel, where the pedal becomes either too soft or too stiff during braking.
  • In some cases, the traction control system may become disabled, which can affect vehicle stability during acceleration.
  • The check engine light may also accompany the ABS warning, indicating multiple issues that need addressing.

Possible Causes

Most common causes of U0112 (ordered by frequency):

  1. A damaged wiring harness or loose connections, accounting for approximately 60% of U0112 cases. These can occur due to wear and tear or environmental factors.
  2. Faulty ABS module, which may fail to send or receive messages correctly due to internal malfunctions. This is the second most common cause, occurring in about 25% of cases.
  3. Corroded connectors or terminals that can impede proper communication between the ECM and ABS module. Regular inspections can help prevent this issue.
  4. Less common causes include software glitches in the ECM that might require a firmware update or reprogramming.
  5. In rare instances, a complete failure of the ECM itself can occur, necessitating replacement.

U0112 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing or replacing damaged wiring and connectors between the ECM and ABS module.

  • Total: $150 - $300
  • Success rate: 80%
ABS Module Replacement

Replacing a faulty ABS module that fails to communicate with the ECM.

  • Total: $500 - $1,200
  • Success rate: 95%
ECM Reprogramming

Updating or reprogramming the ECM software to resolve communication issues.

  • Total: $100 - $250
  • Success rate: 70%
Money-Saving Tips for U0112
  • 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 U0112 Diagnosis Process

Follow these systematic steps to accurately diagnose U0112. 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 or specific diagnostic tools to test suspected components, focusing on wiring and connectors (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, focusing on wiring and connectors (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: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (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: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (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: Wiring Issues Found in 2015 Ford F-150

Vehicle: 2015 Ford F-150, 75,000 miles

Problem: Customer reported ABS warning light on and inconsistent braking performance.

Diagnosis: After running a diagnostic with GeekOBD APP, code U0112 was confirmed. A visual inspection revealed damaged wiring harness near the ABS module.

Solution: Replaced the damaged wiring and secured connections. Cleared the code and performed a road test.

Cost: $250 (diagnostic fee and parts)

Result: The ABS light was cleared, and braking performance returned to normal.

Case Study 2: ABS Module Replacement for 2013 Chevrolet Silverado

Vehicle: 2013 Chevrolet Silverado, 90,000 miles

Problem: Owner experienced ABS light and traction control issues.

Diagnosis: Diagnostic scan revealed U0112. Tests indicated a malfunctioning ABS module.

Solution: Replaced the ABS module and reprogrammed the ECM using the GeekOBD APP.

Cost: $800 (including parts and labor)

Result: The ABS system functioned properly post-repair, with no further issues reported.

Diagnose U0112

Use GeekOBD APP for professional diagnosis!

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Code Information

Code: U0112
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes