U0987 - Communication Error in Automotive Systems: A Guide for Ford and Chevrolet Owners

Quick Answer

U0987 means: U0987 indicates a communication error between vehicle control modules.

Fix: Check and replace faulty components Cost: $300 - $1,200 Time: 90-180 minutes

Can I drive with U0987? Immediate attention is recommended to avoid further issues.

Common Questions

What does U0987 mean and how does it affect my car?

U0987 indicates a problem with communication between your vehicle's control modules. This can lead to multiple issues including warning lights on your dashboard, erratic behavior of electrical components, and compromised vehicle performance. Over time, if left unresolved, it could lead to more serious and costly repairs.

What are the most common causes of U0987 and how much does it cost to fix?

Common causes include faulty control modules, damaged wiring, and software glitches. Repair costs can range from $100 for simple wiring fixes to over $1,200 for control module replacements depending on the specific issue.

Can I drive my car with U0987 or should I stop immediately?

It’s best to avoid driving your vehicle if you see the U0987 code. Continuing to drive with this code can lead to increased damage or safety issues, as it may affect crucial systems in your vehicle.

How can I diagnose U0987 myself using GeekOBD APP?

You can use the GeekOBD APP to scan for DTCs, view live data from your vehicle's control modules, and read freeze frame data to understand the context of the U0987 code. This information can help you pinpoint the issue more effectively.

What vehicles are most commonly affected by U0987?

Commonly affected vehicles include the 2014-2018 Ford F-150 and the 2015-2019 Chevrolet Silverado. Always check for recalls or technical service bulletins (TSBs) related to module communication issues.

How can I prevent U0987 from happening again?

Regular maintenance, including checking electrical connections and keeping control modules updated with the latest software, can help prevent recurrence of U0987. Also, keeping your battery in good condition is crucial for maintaining communication integrity.

What is U0987?

The diagnostic trouble code (DTC) U0987 indicates a communication error between the vehicle's control modules, particularly affecting models like the 2014-2018 Ford F-150 and the 2015-2019 Chevrolet Silverado. This code often arises when one or more control modules fail to communicate effectively, leading to potential issues in vehicle performance and functionality. Essentially, each module in your vehicle, such as the engine control module (ECM), transmission control module (TCM), and body control module (BCM), relies on data from other modules to function properly. When a communication breakdown occurs, it can result in various symptoms, including warning lights, erratic behavior of electrical components, and performance issues. Ignoring this code can lead to more severe problems down the line, making timely diagnosis and repair crucial. Moreover, the implications of this code extend beyond mere dashboard indicators; they can affect the safety and efficiency of your vehicle. Addressing this error promptly can save you from costly repairs and ensure your vehicle operates smoothly.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0987 is present:

  • The check engine light remains illuminated, indicating a persistent issue that needs addressing.
  • Electrical components, such as windows or locks, behave erratically, showing signs of malfunction due to poor communication.
  • Engine performance may suffer, with noticeable hesitations during acceleration or stalling.
  • Inconsistent fuel economy, potentially decreasing by 15-20%, suggests inefficiencies caused by the communication fault.
  • Other warning lights may appear on the dashboard, indicating multiple system malfunctions related to the communication error.

Possible Causes

Most common causes of U0987 (ordered by frequency):

  1. The most common cause is a faulty control module, occurring in about 60% of cases, where the module itself may fail or become unresponsive due to age or damage.
  2. Another common issue is damaged wiring or connectors, which can lead to intermittent communication failures. Corrosion or physical damage can disrupt electrical signals.
  3. Software glitches in the vehicle's firmware can also lead to communication errors, which can sometimes be resolved with a software update.
  4. Less common but serious causes include a malfunctioning CAN bus system, where the communication network itself may be compromised, affecting multiple modules.
  5. Rarely, issues with the vehicle's battery or electrical system can cause voltage drops that lead to communication failures between modules.

U0987 Repair Costs

Cost Breakdown by Repair Type

Control Module Replacement

Replacing a faulty control module, which may involve programming and setup.

  • Total: $300 - $1,200
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring or connectors that impact communication.

  • Total: $100 - $500
  • Success rate: 90%
Money-Saving Tips for U0987
  • 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 U0987 Diagnosis Process

Follow these systematic steps to accurately diagnose U0987. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection to check for damaged wiring, loose connectors, or signs of corrosion that could affect module communication (5-10 minutes)

Step 1: Conduct an initial visual inspection to check for damaged wiring, loose connectors, or signs of corrosion that could affect module communication (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: Use the GeekOBD APP to perform an OBD2 scan, retrieving all codes and freeze frame data to gain context for the fault (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan, retrieving all codes and freeze frame data to gain context for the fault (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: Test suspected components with a multimeter or specialized diagnostic tools to determine their operational status (20-30 minutes)

Step 3: Test suspected components with a multimeter or specialized diagnostic tools to determine their operational status (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: After performing any necessary repairs, conduct a system functionality test to verify the resolution of the issue and clear any codes (10-15 minutes)

Step 4: After performing any necessary repairs, conduct a system functionality test to verify the resolution of the issue and clear any 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 the vehicle under various conditions to confirm that the repair was successful, ensuring that no codes reappear (15-20 minutes)

Step 5: Road test the vehicle under various conditions to confirm that the repair was successful, ensuring 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: 2015 Ford F-150 Communication Error Fix

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

Problem: Customer reported multiple warning lights illuminating and erratic behavior of the electrical system.

Diagnosis: Utilized GeekOBD APP to retrieve U0987 code and performed visual inspections that revealed a damaged wiring harness.

Solution: Repaired the wiring harness and updated the module software.

Cost: $350

Result: All warning lights cleared and vehicle performance returned to normal.

Case Study 2: 2017 Chevrolet Silverado Module Replacement

Vehicle: 2017 Chevrolet Silverado, 60,000 miles

Problem: Persistent check engine light and malfunctioning power windows.

Diagnosis: After scanning with GeekOBD APP, confirmed U0987 and tested control modules, finding the BCM faulty.

Solution: Replaced the body control module and programmed it to the vehicle.

Cost: $800 (parts and labor)

Result: Resolved issues with windows and cleared check engine light.

Diagnose U0987

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: U0987
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes