Quick Answer
U087D means: U087D indicates a communication error between vehicle control modules.
Can I drive with U087D? Immediate attention is recommended to avoid potential vehicle malfunctions.
Common Questions
What does U087D mean and how does it affect my car?
U087D indicates a communication error between your vehicle's body control module and transmission control module. This can lead to symptoms like erratic shifting, malfunctioning electronic features, or even failure to start your vehicle. Addressing this issue is essential to ensure your vehicle operates smoothly and safely.
What are the most common causes of U087D and how much does it cost to fix?
Common causes of U087D include faulty wiring (60% likelihood), malfunctioning BCM (25%), and software issues. Repair costs can vary, with simple wiring repairs ranging from $100 to $300, while BCM replacement can cost between $300 and $800.
Can I drive my car with U087D or should I stop immediately?
It is advisable to avoid driving your car if you see the U087D code, as it indicates a communication failure that could lead to more severe issues. If you must drive, do so with caution and seek repairs at your earliest convenience.
How can I diagnose U087D myself using GeekOBD APP?
To diagnose U087D using the GeekOBD APP, connect the app to your vehicle’s OBD2 port. Run a complete scan to retrieve fault codes, and check the freeze frame data to understand the conditions under which the code appeared. Look for any accompanying codes that can provide more context.
What vehicles are most commonly affected by U087D?
U087D is frequently reported in models like the 2015-2018 Chevrolet Silverado and GMC Sierra. It's important to check for any recalls or technical service bulletins (TSBs) related to electrical issues for these vehicles.
How can I prevent U087D from happening again?
To prevent U087D, regularly inspect your vehicle's wiring and connectors for wear or corrosion. Ensure that any software updates for your vehicle’s control modules are performed at the dealership, and maintain your battery in good condition to prevent electrical issues.
What is U087D?
The U087D diagnostic trouble code (DTC) indicates a communication error between the vehicle’s control modules, specifically related to the body control module (BCM) and the transmission control module (TCM). This code typically arises when the BCM receives an invalid signal from the TCM, indicating that the two modules are unable to communicate effectively. In practical terms, this could lead to various operational issues, such as erratic shifting, malfunctioning accessories, or even failure to start. The U087D code can often be accompanied by other codes that point to specific modules or systems that may be affected, which can complicate diagnosis and repair. For vehicle owners, this means that if you encounter this code, it’s crucial to address it promptly to avoid further complications or damage. Common in models like the 2015-2018 Chevrolet Silverado and GMC Sierra, this issue often manifests as a persistent check engine light or an unresponsive electronic feature within the vehicle. Ignoring this code can lead to more significant problems down the line, so taking it seriously is vital for maintaining vehicle performance and safety.
System: U - Network (Communication, CAN Bus)
Symptoms
Common symptoms when U087D is present:
- Check engine light remains illuminated consistently, indicating a serious issue that needs addressing.
- Transmission may exhibit erratic behavior, such as slipping or harsh shifting, affecting driving comfort and safety.
- Electronic accessories like windows or locks may operate intermittently or fail to respond altogether, leading to inconvenience.
- In some cases, the vehicle may fail to start, especially if the TCM cannot send the necessary signals for ignition.
- Fuel economy may decrease significantly due to improper engine operation and shifting patterns.
Possible Causes
Most common causes of U087D (ordered by frequency):
- The most common cause of the U087D code is faulty wiring or connections between the BCM and TCM, which accounts for about 60% of cases. This can include frayed wires or corrosion.
- A second common cause is a malfunctioning body control module itself, which can lead to incorrect signals being sent. This can occur in up to 25% of cases.
- A third cause includes software issues, which can usually be resolved through a simple reprogramming at a dealership or qualified repair facility.
- Less commonly, a failed transmission control module may cause this code, necessitating replacement or extensive repairs.
- A rare but possible cause could be a complete electrical failure, often linked to battery issues or major wiring harness damage.
U087D Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repairing damaged wiring or connections between the BCM and TCM.
- Total: $100 - $300
- Success rate: 90%
BCM Replacement
Replacing a malfunctioning body control module.
- Total: $300 - $800
- Success rate: 85%
TCM Reprogramming
Reprogramming the transmission control module to correct software issues.
- Total: $75 - $150
- Success rate: 95%
Money-Saving Tips for U087D
- 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 U087D Diagnosis Process
Follow these systematic steps to accurately diagnose U087D. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)
Step 2: 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 3: Step 3
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components (20-30 minutes)
Step 4: Step 4
Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)
Step 5: Step 5
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (15-20 minutes)
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 Repair in a 2017 Chevrolet Silverado
Vehicle: 2017 Chevrolet Silverado 1500, 45,000 miles
Problem: Customer reported a persistent check engine light and erratic transmission shifting.
Diagnosis: Diagnostic scan revealed U087D along with several other codes. Visual inspection showed damaged wiring near the BCM.
Solution: Repaired the damaged wiring and secured all connections. Cleared codes and verified operation.
Cost: $200 for wiring repair.
Result: The check engine light was cleared, and the vehicle operated smoothly after repairs.
Case Study 2: BCM Replacement in a 2018 GMC Sierra
Vehicle: 2018 GMC Sierra 1500, 30,000 miles
Problem: Vehicle experienced failure to start intermittently and electronic accessories not functioning.
Diagnosis: U087D was present along with a BCM malfunction code.
Solution: Replaced the body control module and reprogrammed it to the vehicle.
Cost: $600 for BCM replacement.
Result: Resolved the starting issues and all electronic features functioned properly post-repair.