Quick Answer
C0B90 means: DTC C0B90 indicates an issue with the occupant classification system in your vehicle.
Can I drive with C0B90? Immediate attention is advised to ensure passenger safety.
Common Questions
What does C0B90 mean and how does it affect my car?
DTC C0B90 indicates a malfunction in the occupant classification system. This means that the vehicle is unable to properly assess the presence of a passenger in the front seat, which could lead to safety issues in an accident, particularly with airbag deployment. It is crucial to address this code promptly to ensure that your airbag system is functioning correctly.
What are the most common causes of C0B90 and how much does it cost to fix?
The most common cause of DTC C0B90 is a faulty seat occupancy sensor, which can cost between $150 and $300 to replace. Other potential causes include damaged wiring or connectors, which might cost around $100 to $250 to repair, and issues with the airbag control module, which can range from $300 to $600 for repair or replacement.
Can I drive my car with C0B90 or should I stop immediately?
It is not advisable to drive your car with DTC C0B90 present. This code indicates a potential malfunction in the airbag system, which could compromise passenger safety in the event of an accident. It’s best to have the vehicle inspected and repaired as soon as possible.
How can I diagnose C0B90 myself using GeekOBD APP?
To diagnose C0B90 using the GeekOBD APP, start by connecting the app to your vehicle’s OBD2 port. Run a full scan to retrieve all codes and look for C0B90. The app will also provide freeze frame data to help understand when the code was triggered. You can then check the seat occupancy sensor and wiring using a multimeter for any faults.
What vehicles are most commonly affected by C0B90?
DTC C0B90 is frequently reported in various Ford models, particularly the 2017-2021 Ford F-150. Other makes may also experience this code, especially those with advanced airbag systems. Always check for recalls or technical service bulletins (TSBs) related to airbag systems for your specific vehicle.
How can I prevent C0B90 from happening again?
To prevent DTC C0B90 from recurring, regularly inspect and maintain the wiring and connectors in the seat area. Avoid placing heavy objects on the seats that could damage the sensor. Additionally, consider keeping your vehicle’s software updated to minimize electronic glitches that could affect the airbag system.
What is C0B90?
DTC C0B90 is a diagnostic trouble code that indicates a problem with the occupant classification system, primarily found in vehicles equipped with advanced safety features and airbag systems. In simpler terms, this code means that your vehicle's system is having trouble detecting the presence and weight of a passenger in the seat. This can lead to the airbag not deploying properly in the event of an accident, which poses a serious safety risk. Commonly seen in vehicles like the 2017-2021 Ford F-150, this code can trigger the airbag warning light on your dashboard, prompting immediate attention. The underlying issue may stem from a faulty seat sensor, damaged wiring, or a malfunctioning control module. Ignoring this code could compromise passenger safety and lead to costly repairs if the airbag system is activated incorrectly. Therefore, understanding and addressing DTC C0B90 is crucial for maintaining the safety and functionality of your vehicle’s safety systems.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0B90 is present:
- The airbag warning light is illuminated on the dashboard, signaling a potential issue with the airbag system.
- The seatbelt chime may sound unexpectedly, indicating a fault in the occupant detection system.
- Inconsistent airbag deployment during tests or diagnostics, which can be checked using an OBD2 scanner.
- The vehicle may fail safety inspections due to the airbag system error.
- An increased risk of injury in the event of an accident if the airbag does not deploy properly.
Possible Causes
Most common causes of C0B90 (ordered by frequency):
- The most common cause of DTC C0B90 is a faulty seat occupancy sensor, which can occur in about 70% of cases. This sensor is responsible for detecting whether a passenger is present and their weight, and if it fails, the system cannot function correctly.
- Another likely cause is damaged wiring or connectors in the seat area. Over time, connectors may corrode or wires may fray due to movement, which can disrupt communication within the airbag system.
- A malfunctioning airbag control module may also trigger this code. This module processes signals from the various sensors, and if it fails, it could misinterpret the data, leading to C0B90.
- Less commonly, an issue with the vehicle's main body control module may interfere with the airbag system, but this is a serious concern requiring in-depth diagnosis.
- Rarely, software glitches in the vehicle’s onboard systems can cause DTC C0B90 to appear, requiring a software update from a qualified dealership or technician.
C0B90 Repair Costs
Cost Breakdown by Repair Type
Seat Occupancy Sensor Replacement
Replacing the faulty seat occupancy sensor to restore proper airbag function.
- Total: $150 - $300
- Success rate: 85%
Airbag Control Module Repair
Repair or replacement of the airbag control module if the issue lies within this component.
- Total: $300 - $600
- Success rate: 75%
Wiring Repair
Repairing or replacing damaged wiring harness or connectors in the seat area.
- Total: $100 - $250
- Success rate: 70%
Money-Saving Tips for C0B90
- 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 C0B90 Diagnosis Process
Follow these systematic steps to accurately diagnose C0B90. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Initial visual inspection - Start by checking the seat area for any obvious signs of damage, such as frayed wires or disconnected connectors (5-10 minutes)
Step 1: Initial visual inspection - Start by checking the seat area for any obvious signs of damage, such as frayed wires or disconnected connectors (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Use the GeekOBD APP to retrieve all diagnostic codes related to the airbag system, including freeze frame data to understand the context of the fault (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Use the GeekOBD APP to retrieve all diagnostic codes related to the airbag system, including freeze frame data to understand the context of the fault (10-15 minutes).
Step 3: Step 3: Component testing - Utilize a multimeter to test the seat occupancy sensor and associated wiring for continuity and proper voltage (20-30 minutes)
Step 3: Component testing - Utilize a multimeter to test the seat occupancy sensor and associated wiring for continuity and proper voltage (20-30 minutes).
Step 4: Step 4: System function test - After repairs, use the GeekOBD APP to clear the codes and verify that the airbag system is functioning correctly (10-15 minutes)
Step 4: System function test - After repairs, use the GeekOBD APP to clear the codes and verify that the airbag system is functioning correctly (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm the airbag system operates as intended and that the warning light remains off (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm the airbag system operates as intended and that the warning light remains off (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: Seat Occupant Sensor Replacement in 2018 Ford F-150
Vehicle: 2018 Ford F-150, 60,000 miles
Problem: Customer reported the airbag warning light was illuminated, and the seatbelt chime was sounding intermittently.
Diagnosis: Using the GeekOBD APP, the technician confirmed DTC C0B90. A visual inspection revealed frayed wires leading to the seat occupancy sensor.
Solution: The technician replaced the seat occupancy sensor and repaired the damaged wiring. After clearing the codes, a function test confirmed the airbag system was operational.
Cost: $250 (sensor replacement $150, wiring repair $100)
Result: The airbag warning light remained off, and the customer was satisfied with the repair.
Case Study 2: Airbag Control Module Replacement in 2020 Ford Explorer
Vehicle: 2020 Ford Explorer, 20,000 miles
Problem: The vehicle's airbag warning light was on, and diagnostics showed C0B90.
Diagnosis: The technician found no issues with the seat sensor but determined the airbag control module was malfunctioning after testing.
Solution: The control module was replaced, and the system was recalibrated using the GeekOBD APP.
Cost: $500 (control module $400, labor $100)
Result: Post-repair diagnostics showed no codes, and the airbag system functioned correctly.