Quick Answer
B0138 means: B0138 indicates a high voltage issue in the airbag sensor circuit.
Can I drive with B0138? Immediate attention is advised as it affects airbag deployment.
Common Questions
What does B0138 mean and how does it affect my car?
The B0138 code signifies a high voltage issue in the airbag sensor circuit, which could prevent airbags from deploying in the event of an accident. This affects vehicle safety significantly, urging immediate diagnostic and repair.
What are the most common causes of B0138 and how much does it cost to fix?
The most common causes include a faulty airbag sensor (50% likelihood), damaged wiring (30%), and software glitches (5%). Repair costs can range from $100 to $600 depending on the specific issue.
Can I drive my car with B0138 or should I stop immediately?
It's not recommended to drive with B0138 active, as it indicates possible airbag failure. Without functional airbags, safety in a collision is compromised.
How can I diagnose B0138 myself using GeekOBD APP?
You can use the GeekOBD APP to scan for DTCs, view live data on airbag voltage, and access freeze frame data that helps you understand when the error occurred.
What vehicles are most commonly affected by B0138?
Common vehicles affected by B0138 include the 2010-2016 Ford F-150 and the 2011-2015 Chevrolet Silverado. Always check for any recalls related to these models as they may have known issues.
How can I prevent B0138 from happening again?
Regularly inspect the airbag system for corrosion, avoid aftermarket modifications, and keep wiring secure and intact to prevent future occurrences of the B0138 code.
What is B0138?
The diagnostic trouble code (DTC) B0138 is a specific code that indicates a problem with the airbag sensor circuit, particularly indicating high voltage. This code is most commonly found in vehicles from manufacturers such as Ford and Chevrolet. The airbag system is critical for passenger safety, and any issues related to it should be addressed promptly. When B0138 is triggered, it suggests that the voltage in the airbag sensor circuit has risen above the acceptable range. This can happen due to a variety of reasons including faulty wiring, a malfunctioning airbag sensor, or a problem with the vehicle’s airbag control module. Real-world implications of this code can lead to the airbag system becoming disabled, meaning that in the event of a collision, the airbags may not deploy. This could significantly increase the risk of injury to occupants during an accident. It is essential for vehicle owners to take warnings related to this code seriously and seek professional diagnostics and repairs. Ignoring this code could lead to safety hazards and potentially costly repairs down the road. Always ensure to have your vehicle inspected by a qualified technician when this code appears to safeguard your vehicle's airbag functionality.
System: B - Body (Airbags, Lighting, Security, Climate Control)
Symptoms
Common symptoms when B0138 is present:
- The airbag warning light on the dashboard illuminates and remains lit, indicating a malfunction in the airbag system.
- Drivers may notice that the vehicle's airbag system does not respond during self-checks, meaning airbags may not deploy in an accident.
- There may be intermittent electrical issues, such as failure of other vehicle systems, potentially linked to faulty wiring in the airbag circuit.
- A noticeable increase in vehicle electrical issues, such as flickering lights, can indicate power issues affecting the airbag system.
- In some cases, drivers may experience a loss of other safety features, such as the seatbelt reminder system, due to circuit problems.
Possible Causes
Most common causes of B0138 (ordered by frequency):
- {'description': 'Faulty airbag sensor or module - Approximately 50% of cases involve a malfunctioning airbag sensor or control module that causes high voltage readings.', 'likelihood': '50%'}
- {'description': 'Damaged wiring or connectors - Worn or corroded wiring can create resistance leading to high voltage. Inspect wiring and connectors for damage.', 'likelihood': '30%'}
- {'description': 'Interference from aftermarket modifications - Any aftermarket installations can inadvertently cause electrical issues, impacting the airbag system.', 'likelihood': '10%'}
- {'description': 'Faulty ground connections - Poor grounding can lead to voltage spikes. Inspect ground points for corrosion or looseness.', 'likelihood': '5%'}
- {'description': 'Rarely, a software glitch in the airbag control module can cause false readings. This may require a software update from the manufacturer.', 'likelihood': '5%'}
B0138 Repair Costs
Cost Breakdown by Repair Type
Airbag Sensor Replacement
Replacing a faulty airbag sensor typically resolves the B0138 code.
- Total: $150 - $600
- Success rate: 90%
Wiring Repair
Repairing damaged wiring or connectors in the airbag circuit can eliminate high voltage issues.
- Total: $100 - $300
- Success rate: 80%
Control Module Reprogramming
If the control module is malfunctioning due to software, reprogramming it may be necessary.
- Total: $100 - $250
- Success rate: 70%
Money-Saving Tips for B0138
- 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 B0138 Diagnosis Process
Follow these systematic steps to accurately diagnose B0138. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Perform an initial visual inspection of the airbag wiring and connectors to check for physical damage or corrosion (5-10 minutes)
Step 1: Perform an initial visual inspection of the airbag wiring and connectors to check for physical damage or corrosion (5-10 minutes).
Step 2: Step 2: Use a diagnostic scanner like the GeekOBD APP to read the fault codes and capture freeze frame data to understand the circumstances under which the code was set (10-15 minutes)
Step 2: Use a diagnostic scanner like the GeekOBD APP to read the fault codes and capture freeze frame data to understand the circumstances under which the code was set (10-15 minutes).
Step 3: Step 3: Test the airbag sensor using a multimeter to confirm its functionality and check for proper voltage levels (20-30 minutes)
Step 3: Test the airbag sensor using a multimeter to confirm its functionality and check for proper voltage levels (20-30 minutes).
Step 4: Step 4: Conduct a system function test after repairs to ensure all components are working correctly and clear any codes from the system (10-15 minutes)
Step 4: Conduct a system function test after repairs to ensure all components are working correctly and clear any codes from the system (10-15 minutes).
Step 5: Step 5: Perform a road test under various conditions to verify that the airbag system operates as intended and that no warning lights reappear (15-20 minutes)
Step 5: Perform a road test under various conditions to verify that the airbag system operates as intended and that no warning lights reappear (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: 2015 Ford F-150 - Airbag Warning Light
Vehicle: 2015 Ford F-150, 70,000 miles
Problem: The customer reported that the airbag warning light was on and had noticed issues with airbag deployment during self-check.
Diagnosis: After scanning with GeekOBD APP, B0138 was confirmed. A visual inspection revealed damaged wiring near the airbag sensor.
Solution: Replaced the damaged wiring and the airbag sensor, and cleared the codes.
Cost: $350 (wiring repair $100 + sensor $250)
Result: The airbag system was restored to full functionality, and the warning light was resolved.
Case Study 2: 2013 Chevrolet Silverado - Airbag System Fault
Vehicle: 2013 Chevrolet Silverado, 85,000 miles
Problem: Customer experienced intermittent airbag warning light and reported previous accidents affecting the airbag system.
Diagnosis: Scan revealed B0138. The control module was tested and found to be malfunctioning.
Solution: Reprogrammed the airbag control module and replaced a faulty connector.
Cost: $400 (reprogramming $150 + connector $250)
Result: Airbag system was functioning correctly post-repair, and the customer was satisfied.