U0A87 - Communication Error in Vehicle Control Systems (Common in 2015-2020 Ford F-150, Chevrolet Silverado)

Quick Answer

U0A87 means: U0A87 indicates a communication failure between vehicle control modules.

Fix: Check and replace faulty components Cost: $100 - $300 Time: 90-180 minutes

Can I drive with U0A87? Immediate attention is recommended to prevent further complications.

Common Questions

What does U0A87 mean and how does it affect my car?

The U0A87 code signifies a communication issue within your vehicle's electronic systems. This can affect various components, potentially leading to unreliable performance and safety concerns. For example, critical features like the anti-lock braking system or traction control may not function properly, which can be dangerous. It's crucial to address this issue promptly to ensure your vehicle operates safely and efficiently in the long run.

What are the most common causes of U0A87 and how much does it cost to fix?

Common causes of the U0A87 code include damaged wiring (60% likelihood), software glitches, and corrosion in connectors. Repair costs can range from $100 for wiring repairs to $150 for software updates. Addressing these issues quickly can prevent further complications and keep repair costs manageable.

Can I drive my car with U0A87 or should I stop immediately?

It's not advisable to drive your vehicle with a U0A87 code present, as it indicates potential failures in critical systems. Continuing to drive could lead to more severe problems or even compromise your safety. If you encounter this code, it's best to have your vehicle inspected as soon as possible.

How can I diagnose U0A87 myself using GeekOBD APP?

To diagnose U0A87 using the GeekOBD APP, start by connecting your device to the OBD2 port of your vehicle. Use the app to scan for trouble codes and retrieve freeze frame data. Pay attention to any additional codes that may be present, as they can provide more context on the U0A87 issue. Follow the diagnostic steps provided within the app to pinpoint the underlying problem.

What vehicles are most commonly affected by U0A87?

The U0A87 code is frequently seen in vehicles such as the 2015-2020 Ford F-150 and Chevrolet Silverado models. While it's not exclusive to these types, these vehicles often experience issues due to their complex electronic systems. Always check for any recalls or technical service bulletins (TSBs) related to your specific vehicle make and model.

How can I prevent U0A87 from happening again?

To prevent the U0A87 code from recurring, perform regular maintenance checks on the vehicle's wiring and connectors. Keeping the battery in good condition and ensuring software updates are applied can also help. Additionally, using protective covers for exposed connectors can guard against moisture and corrosion.

What is U0A87?

The U0A87 diagnostic trouble code (DTC) indicates a communication error between modules in the vehicle's control systems. This code typically arises when there's a disruption in the data exchange between modules, such as the powertrain control module (PCM) and various body or safety systems. In practical terms, this means that the vehicle's electronic components are not able to effectively share critical information. The implications can range from minor inconveniences, like the malfunction of certain features, to major safety concerns where critical systems may fail to operate correctly. For instance, in models like the 2015-2020 Ford F-150, you may notice issues with adaptive cruise control or electronic stability control. Since modern vehicles heavily rely on a network of sensors and electronic modules, a U0A87 code can lead to symptoms such as warning lights on the dashboard, erratic performance, or even failure to start. Addressing this code promptly is essential to maintain the reliability and safety of your vehicle. If left unresolved, the issue could lead to more extensive damage and costly repairs down the line.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0A87 is present:

  • Check engine light stays on constantly, indicating a persistent fault in the vehicle's communication system.
  • Adaptive cruise control may become unresponsive, leading to difficulties in maintaining speed on the highway, which can be frustrating for drivers.
  • Fuel economy decreased by 10-15% due to potential miscommunication between the engine control module and transmission systems.
  • Erratic behavior of dashboard indicators, such as warning lights flickering or not functioning at all, leading to confusion about the vehicle's status.
  • In some cases, the vehicle may fail to start, as critical systems are unable to communicate effectively.

Possible Causes

Most common causes of U0A87 (ordered by frequency):

  1. The most common cause of U0A87 is damaged wiring or connectors, with a likelihood of around 60%. Frayed wires or loose connections can interrupt communication between modules.
  2. A second likely cause is software glitches or outdated firmware in the vehicle's control modules, which may need to be updated through a dealer service.
  3. Thirdly, corrosion or moisture intrusion in connectors, especially in vehicles frequently exposed to harsh conditions, can lead to communication failures. Regular inspections can help prevent this.
  4. A less common yet serious cause could be a failing control module itself, which may require replacement to resolve the issue.
  5. Rarely, issues with the vehicle's battery or charging system can cause voltage fluctuations, leading to communication errors between modules.

U0A87 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repair or replace damaged wiring and connectors involved in the communication network.

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

Update the software of the control modules to the latest version.

  • Total: $50 - $150
  • Success rate: 75%
Money-Saving Tips for U0A87
  • 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 U0A87 Diagnosis Process

Follow these systematic steps to accurately diagnose U0A87. 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

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components. Look for voltage irregularities (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 the repair's success (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm the repair's 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: Ford F-150 U0A87 Communication Issue

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

Problem: Customer reported check engine light and unresponsive adaptive cruise control.

Diagnosis: Initial scan revealed U0A87 code along with other communication-related codes. A visual inspection showed frayed wiring in the cruise control module.

Solution: Replaced damaged wiring and secured all connections. Updated control module software using dealer service.

Cost: $250 (wiring repair: $150, software update: $100)

Result: After repairs, adaptive cruise control functioned normally, and the check engine light was cleared.

Case Study 2: Chevrolet Silverado U0A87 Electrical Glitch

Vehicle: 2019 Chevrolet Silverado, 30,000 miles

Problem: Customer noticed erratic dashboard lights and occasional failure to start.

Diagnosis: Diagnostic scan indicated U0A87. Inspection revealed corrosion in the main wiring harness connectors.

Solution: Cleaned connectors and applied dielectric grease to prevent future corrosion. Repaired any damaged wires.

Cost: $180 (cleaning and repair: $80, parts: $100)

Result: Vehicle operated normally after repairs, with no further issues reported.

Diagnose U0A87

Use GeekOBD APP for professional diagnosis!

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Code Information

Code: U0A87
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes