U012C - Lost Communication with the Anti-Lock Brake System Control Module (Common in 2015-2018 Honda Accord)

Quick Answer

U012C means: U012C indicates a communication issue between the ECM and ABS control module.

Fix: Check and replace faulty components Cost: $300 - $800 Time: 90-180 minutes

Can I drive with U012C? Immediate attention is recommended due to potential safety concerns.

Common Questions

What does U012C mean and how does it affect my car?

The U012C code indicates a communication problem between your engine and anti-lock brake system. This can affect your vehicle's braking performance, particularly in emergency situations, as the ABS may not engage properly when needed. It’s crucial to address this issue to maintain optimal safety.

What are the most common causes of U012C and how much does it cost to fix?

Common causes include a faulty ABS control module, damaged wiring, and software glitches. Repair costs can range from $100 for wiring repairs to $800 for module replacement, depending on the specific issue and vehicle make.

Can I drive my car with U012C or should I stop immediately?

While you may be able to drive your vehicle, it's not recommended. The braking system's effectiveness may be compromised, leading to unsafe driving conditions. It's best to have it checked as soon as possible to ensure your safety.

How can I diagnose U012C myself using GeekOBD APP?

Start by connecting the GeekOBD APP to your vehicle’s OBD2 port. Use it to read all diagnostic codes, including U012C. Pay attention to freeze frame data that can provide context on when the error occurred. Look for additional codes that might indicate related issues.

What vehicles are most commonly affected by U012C?

The U012C code is frequently seen in vehicles like the 2015-2018 Honda Accord, 2016-2019 Toyota Camry, and 2017-2019 Ford Fusion. It's advisable to check for any recalls or technical service bulletins related to the ABS system for these models.

How can I prevent U012C from happening again?

Regular maintenance checks, especially of the electrical systems and ABS components, can help prevent issues. Additionally, keep your vehicle clean to avoid corrosion, and ensure that aftermarket modifications are properly installed.

What is U012C?

The DTC U012C code indicates that there's a communication failure between your vehicle's Engine Control Module (ECM) and the Anti-lock Brake System (ABS) control module. This can lead to a range of performance issues, particularly with your vehicle's braking system. When the ABS control module can't communicate with the ECM, critical safety features may be disabled, affecting your ability to stop safely in certain conditions. Drivers may experience symptoms like the ABS warning light illuminating on the dashboard, or even a complete loss of ABS functionality. While many vehicles can still operate normally without this communication, it's essential to address the root cause of the code to ensure your braking system works effectively. Ignoring this code could lead to increased stopping distances and a higher risk of accidents, especially in adverse weather conditions. Therefore, understanding and troubleshooting the U012C code is crucial for maintaining vehicle safety and reliability.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U012C is present:

  • ABS warning light stays illuminated on the dashboard, indicating a problem with the braking system.
  • Unusual braking behavior, such as the brakes locking up or not responding as expected, which may cause safety issues.
  • Loss of traction control functionality, which can be particularly dangerous during wet or slippery conditions.
  • Increased stopping distances, making it harder to stop promptly in emergency situations.
  • Possible engine performance issues, such as stalling or rough idling, due to miscommunication between modules.

Possible Causes

Most common causes of U012C (ordered by frequency):

  1. {'cause': 'Faulty ABS control module - 40% likelihood. The module may fail due to age or electrical issues.', 'details': 'Over time, the ABS module can wear out or develop internal faults that prevent it from communicating properly with the ECM.'}
  2. {'cause': 'Damaged wiring or connectors - 30% likelihood. Wiring issues often result from wear and tear or environmental factors.', 'details': 'Corroded or damaged wires can interrupt communication, often due to exposure to moisture or road debris.'}
  3. {'cause': "Software glitches - 15% likelihood. Updates or bugs in the vehicle's computer system might cause communication errors.", 'details': 'Sometimes, a simple software update can resolve communication issues between modules.'}
  4. {'cause': 'Fuses or relays malfunction - 10% likelihood. A blown fuse can cut off power to the ABS module.', 'details': 'Checking the relevant fuses is a quick diagnostic step that can save you time and money.'}
  5. {'cause': "Incompatible aftermarket modifications - 5% likelihood. Modifications can interfere with the vehicle's electronic systems.", 'details': "Always ensure that aftermarket parts are compatible with your vehicle's electrical system to avoid issues."}

U012C Repair Costs

Cost Breakdown by Repair Type

ABS Control Module Replacement

Replacing a faulty ABS control module with an OEM part.

  • Total: $300 - $800
  • Success rate: 85%
Wiring Repair

Repairing damaged wiring or connectors in the ABS circuit.

  • Total: $100 - $300
  • Success rate: 90%
Software Update

Performing a software update to resolve glitches.

  • Total: $50 - $150
  • Success rate: 75%
Money-Saving Tips for U012C
  • 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 U012C Diagnosis Process

Follow these systematic steps to accurately diagnose U012C. 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 in the ABS system (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion in the ABS system (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 - Use the app to retrieve all diagnostic trouble codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the app to retrieve all diagnostic trouble 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 the ABS control module and check for voltage and ground signal (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the ABS control module and check for voltage and ground signal (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 - After repairs, verify proper operation by performing functional tests on the ABS system and clearing codes (10-15 minutes)

Step 4: System function test - After repairs, verify proper operation by performing functional tests on the ABS system and clearing codes (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 that the ABS system is functioning correctly and that no codes reappear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the ABS system is functioning correctly and that no codes reappear (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: ABS Control Module Replacement in 2017 Honda Accord

Vehicle: 2017 Honda Accord, 45,000 miles

Problem: Customer reported ABS warning light on and unusual braking behavior.

Diagnosis: After running a scan with the GeekOBD APP, U012C was found. A visual inspection revealed corroded wires leading to the ABS module.

Solution: Replaced the ABS control module and repaired damaged wiring.

Cost: $650 (parts: $500, labor: $150)

Result: ABS functionality restored and warning light turned off after repairs.

Case Study 2: Wiring Repair on 2018 Toyota Camry

Vehicle: 2018 Toyota Camry, 30,000 miles

Problem: Driver experienced intermittent ABS warning light and braking issues.

Diagnosis: Diagnosed U012C via GeekOBD APP and found faulty wiring connections.

Solution: Repaired the wiring and ensured all connections were secure.

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

Result: Warning light resolved and normal braking performance restored.

Diagnose U012C

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: U012C
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes