U0156 - Understanding DTC U0156: Common Issues in 2013-2018 Ford F-150s and Other Models

Quick Answer

U0156 means: DTC U0156 indicates a communication failure between the Body Control Module and the Instrument Cluster.

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

Can I drive with U0156? Address this issue immediately to prevent further electronic system failures.

Common Questions

What does U0156 mean and how does it affect my car?

DTC U0156 indicates a communication failure between your car's Body Control Module (BCM) and the Instrument Cluster. This can lead to erratic gauge readings, warning lights, and potential safety issues if left unaddressed. It's important to diagnose and repair the issue to ensure your vehicle operates reliably and safely.

What are the most common causes of U0156 and how much does it cost to fix?

Common causes of U0156 include loose wiring connections, faulty BCMs, or short circuits in the wiring harness. Repair costs can range from $150 for minor wiring fixes to $1,000 for a complete BCM replacement, depending on the severity of the issue.

Can I drive my car with U0156 or should I stop immediately?

While you may still be able to drive your car, it is strongly recommended to address U0156 immediately. Ignoring this code can lead to further electronic failures and potential safety hazards on the road.

How can I diagnose U0156 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform a thorough OBD2 scan to retrieve DTCs and freeze frame data. This will help you understand the context of the fault. Look for related codes and inspect wiring visually as the app suggests potential issues.

What vehicles are most commonly affected by U0156?

The DTC U0156 is often found in vehicles like the 2013-2018 Ford F-150, but it can also appear in other models from Ford and various manufacturers that share similar BCM setups. Checking for recalls or Technical Service Bulletins (TSBs) can provide additional insights.

How can I prevent U0156 from happening again?

Regular maintenance is key to preventing U0156. Ensure your vehicle's wiring is checked periodically, keep connections clean, and stay on top of software updates from your dealership. Additionally, avoid harsh driving conditions that could damage electrical components.

What is U0156?

DTC U0156 is a diagnostic trouble code that indicates a communication issue between the Body Control Module (BCM) and the Instrument Cluster. This code is particularly prevalent in models like the 2013-2018 Ford F-150, but can also appear in other vehicles equipped with similar electronic systems. When this code is triggered, it means that the BCM has lost communication with the Instrument Cluster for a period of time. This loss of communication can lead to various problems including malfunctioning gauges, warning lights, and other dashboard indicators. The underlying issue could be as simple as a loose connection or as complex as a failing BCM or a short circuit in the wiring harness. Ignoring this code can result in more severe electronic failures, making it crucial for car owners to address it promptly. In real-world scenarios, vehicle owners may notice erratic behavior in the dashboard, such as incorrect fuel readings or warning lights that unexpectedly illuminate. If not diagnosed and repaired swiftly, it could lead to safety concerns and decreased reliability.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0156 is present:

  • The check engine light remains on continuously, indicating potential issues with the vehicle's electronic systems.
  • Gauges on the dashboard may behave erratically, such as the speedometer or fuel gauge showing incorrect readings.
  • The vehicle may experience intermittent electrical failures, such as lights flickering or non-functional features.
  • Dashboard warning lights for ABS or airbag might illuminate without apparent cause.
  • In some cases, the vehicle may fail to start due to the BCM's inability to communicate properly.

Possible Causes

Most common causes of U0156 (ordered by frequency):

  1. {'cause': 'Loose or damaged wiring connections (70%)', 'details': 'Wiring issues are the most common cause of DTC U0156. This may involve broken wires or corrosion at connectors that disrupt the electrical signals.'}
  2. {'cause': 'Faulty Body Control Module (BCM) (20%)', 'details': 'A malfunctioning BCM can lead to communication errors. If the module itself is failing, it may require replacement.'}
  3. {'cause': 'Short circuit in the wiring harness (10%)', 'details': 'A short circuit can create a loss of communication between modules. This is less common but can lead to significant electronic issues.'}
  4. {'cause': 'Poor ground connections', 'details': 'Inadequate grounding can affect the performance of electronic modules, leading to various communication codes.'}
  5. {'cause': 'Software glitches', 'details': 'Occasionally, outdated software in the BCM can cause communication errors, requiring a software update.'}

U0156 Repair Costs

Cost Breakdown by Repair Type

Wiring and Connector Repair

Repairing or replacing damaged wiring and connectors to restore communication.

  • Total: $150 - $300
  • Success rate: 85%
BCM Replacement

Replacing a faulty Body Control Module, which is responsible for many vehicle functions.

  • Total: $500 - $1,000
  • Success rate: 90%
Money-Saving Tips for U0156
  • 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 U0156 Diagnosis Process

Follow these systematic steps to accurately diagnose U0156. 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 (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components (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 (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear 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 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: Repair Case: 2015 Ford F-150 with U0156

Vehicle: 2015 Ford F-150, 85,000 miles

Problem: Customer reported intermittent dashboard gauge failures and warning lights.

Diagnosis: After performing a thorough visual inspection and OBD2 scan, the technician found corroded connectors and damaged wiring.

Solution: Repaired the wiring harness and cleaned the connectors, restoring communication.

Cost: $250 (including parts and labor)

Result: The vehicle's dashboard functioned normally after the repair, and the check engine light was cleared.

Case Study 2: Repair Case: 2017 Chevrolet Silverado with U0156

Vehicle: 2017 Chevrolet Silverado, 60,000 miles

Problem: Owner experienced erratic gauge behavior and frequent warning light activations.

Diagnosis: Diagnostic testing revealed a faulty BCM due to a software glitch.

Solution: Replaced the BCM and updated the software, ensuring all systems were operational.

Cost: $800 (including parts and labor)

Result: The vehicle's electronic systems were fully functional post-repair, with no further issues reported.

Diagnose U0156

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: U0156
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes