Quick Answer
C0C90 means: C0C90 indicates a communication issue within the body control module.
Can I drive with C0C90? Address this code promptly to avoid further electrical issues.
Common Questions
What does C0C90 mean and how does it affect my car?
C0C90 indicates a communication failure within your vehicle's body control module, which can disrupt key functions such as power windows and door locks. If ignored, this issue can lead to more significant electrical problems that might compromise your vehicle's operation.
What are the most common causes of C0C90 and how much does it cost to fix?
Common causes include wiring damage (around 60% of cases) and a faulty BCM (25%). Repair costs can range from $100 for wiring repairs to $800 for BCM replacement, depending on the severity of the issue.
Can I drive my car with C0C90 or should I stop immediately?
While you may be able to drive with a C0C90 code, it is not advisable to ignore it. The vehicle may experience electrical issues that could leave you stranded or hinder safe operation. Prompt diagnosis is recommended.
How can I diagnose C0C90 myself using GeekOBD APP?
Using the GeekOBD APP, you can perform an OBD2 scan to retrieve the C0C90 code. Pay attention to freeze frame data and any additional codes that may provide context. This information can guide your troubleshooting process.
What vehicles are most commonly affected by C0C90?
C0C90 is frequently seen in 2016-2022 Ford Fusion models, along with other Ford vehicles. It's essential to check for any recalls or technical service bulletins related to this code for your specific vehicle.
How can I prevent C0C90 from happening again?
To prevent C0C90, ensure regular inspections of your vehicle's electrical system, paying particular attention to wiring and connectors. Keeping up with maintenance can help catch issues before they develop into significant problems.
What is C0C90?
The diagnostic trouble code (DTC) C0C90 typically indicates an issue related to the vehicle's communication network, particularly within the body control module (BCM). This code is often associated with problems in the wiring, connectors, or even the BCM itself. When C0C90 is triggered, it signals that the BCM is unable to communicate effectively with other electronic control units (ECUs) in the vehicle. This can lead to various malfunctions, impacting functions like power windows, door locks, and lighting systems. In real-world terms, if you see this code, your vehicle may exhibit erratic behavior, such as lights flickering, power accessories failing, or even warning lights illuminating on the dashboard. The underlying issue could stem from something as simple as a corroded connector or as complex as a failing BCM. Proper diagnosis is crucial, as ignoring this code could lead to further electrical issues, decreased vehicle functionality, and potentially costly repairs down the line.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0C90 is present:
- Check engine light stays on constantly, indicating a persistent communication fault.
- Power accessories, such as windows and locks, may fail to operate correctly, leading to frustration.
- Dashboard lights may flicker or behave erratically, which can be distracting while driving.
- Vehicle may have intermittent issues with starting or systems not responding, indicating a deeper electrical problem.
- In some cases, the vehicle may experience a complete loss of power to certain functions, leaving you stranded.
Possible Causes
Most common causes of C0C90 (ordered by frequency):
- The most common cause is wiring issues, such as damaged or corroded wires, which have a likelihood of 60%. These can disrupt signal transmission between the BCM and other ECUs.
- Another frequent cause is a faulty body control module itself, which can occur in 25% of cases. A malfunctioning BCM can fail to send or receive signals properly.
- Poor connections at the BCM or related connectors can account for 10% of issues. Regular inspection and maintenance can help prevent this.
- Less commonly, software glitches in the BCM can arise, which, while rare, may require a reprogramming or update to resolve.
- In exceptional cases, external factors such as water damage from leaks or accidents can cause significant electrical issues.
C0C90 Repair Costs
Cost Breakdown by Repair Type
Wiring Repair
Repairing or replacing damaged wiring and connectors.
- Total: $100 - $300
- Success rate: 80%
BCM Replacement
Replacing a faulty body control module.
- Total: $300 - $800
- Success rate: 90%
Money-Saving Tips for C0C90
- 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 C0C90 Diagnosis Process
Follow these systematic steps to accurately diagnose C0C90. 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).
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).
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).
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).
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).
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: 2017 Ford Fusion with C0C90 Diagnosis
Vehicle: 2017 Ford Fusion, 45,000 miles
Problem: Customer reported that the power windows were intermittently failing, and the dashboard lights flickered.
Diagnosis: Initial inspection revealed corroded wiring near the BCM. After a thorough scan with GeekOBD, C0C90 was confirmed.
Solution: Repaired the damaged wiring and cleaned the connectors. Cleared the codes and tested the system.
Cost: $150 (repair cost with parts included)
Result: Post-repair, all electrical functions operated normally without further issues.
Case Study 2: 2019 Ford Escape with C0C90
Vehicle: 2019 Ford Escape, 30,000 miles
Problem: Customer experienced a complete failure of the central locking system and flickering dashboard lights.
Diagnosis: Diagnostic testing showed C0C90. Further inspection indicated a faulty BCM.
Solution: Replaced the BCM and reprogrammed it using the GeekOBD APP.
Cost: $600 (including parts and labor)
Result: After replacement, the locking system and all electrical features functioned correctly.