Quick Answer
B0C71 means: B0C71 indicates a communication issue with the body control module, affecting various electrical systems.
Can I drive with B0C71? Address this issue promptly to avoid further electrical problems.
Common Questions
What does B0C71 mean and how does it affect my car?
The B0C71 code indicates a communication issue within your vehicle's body control module, affecting electrical systems. This can lead to problems like unresponsive locks or malfunctioning lights, which compromise convenience and safety.
What are the most common causes of B0C71 and how much does it cost to fix?
Common causes include a faulty BCM, damaged wiring, or failed sensors. Repair costs can range from $100 for wiring fixes to $800 for BCM replacement depending on the issue.
Can I drive my car with B0C71 or should I stop immediately?
While you may be able to drive with the B0C71 code, it’s not advisable to ignore it. Ignoring this issue can lead to more severe electrical failures or safety concerns.
How can I diagnose B0C71 myself using GeekOBD APP?
Start by using the GeekOBD APP to scan for trouble codes and gather freeze frame data. This will help you understand the context of the issue. Follow up with visual inspections of the BCM and related wiring.
What vehicles are most commonly affected by B0C71?
The B0C71 code is frequently seen in 2016-2020 Ford Explorers and may also appear in other Ford models of similar years, especially those with complex electrical systems.
How can I prevent B0C71 from happening again?
Regular inspections of electrical systems and connections, as well as timely updates to the BCM software, can help prevent the recurrence of the B0C71 code.
What is B0C71?
The Diagnostic Trouble Code (DTC) B0C71 refers to a fault detected in the vehicle's body control module (BCM) or related systems. This code typically indicates an issue with the communication between the BCM and other modules, such as the engine control unit (ECU) or the transmission control module (TCM). In simpler terms, it means that the BCM is not receiving the expected signals or commands from other critical vehicle systems. If you're driving a 2016-2020 Ford Explorer, you may notice that this code often triggers when there are problems with lighting systems, door locks, or sensor inputs. Ignoring this code can lead to more severe issues like malfunctioning electrical components or even compromised safety features, as many systems rely on the BCM for operation. Therefore, it's essential to address this code promptly to avoid more significant repairs down the road. In practical terms, if the B0C71 code appears, you might experience symptoms like flickering lights or unresponsive door locks, which can be quite inconvenient. Regular diagnostics and timely repairs are crucial for maintaining the health of your vehicle.
System: B - Body (Airbags, Lighting, Security, Climate Control)
Symptoms
Common symptoms when B0C71 is present:
- Check engine light stays on constantly, signaling a persistent issue with the body control module.
- Interior lights may flicker or fail to operate, indicating a communication disruption with the BCM.
- Power door locks may become unresponsive or malfunction intermittently, affecting vehicle security.
- Battery drain may occur if the BCM is not properly communicating, as it might keep certain systems active.
- Dashboard warning lights may illuminate erratically, suggesting deeper electrical issues.
Possible Causes
Most common causes of B0C71 (ordered by frequency):
- Faulty body control module (BCM) - 40% likelihood. The BCM may be malfunctioning or damaged due to water intrusion or electrical issues.
- Corroded or damaged wiring - 25% likelihood. Poor connections can interrupt communication, leading to DTC B0C71.
- Failed sensors or actuators - 15% likelihood. If related components are not functioning correctly, they can trigger this code.
- Software glitches - 10% likelihood. BCM firmware may need an update to clear communication errors.
- Less common cause: Faulty ground connections - 5% likelihood. Improper grounding can lead to erratic behavior in electrical systems.
B0C71 Repair Costs
Cost Breakdown by Repair Type
BCM Replacement
Replacing the faulty body control module to restore proper vehicle system communication.
- Total: $300 - $800
- Success rate: 90%
Wiring Repair
Repairing or replacing damaged wiring and connectors related to the BCM.
- Total: $100 - $300
- Success rate: 85%
Money-Saving Tips for B0C71
- 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 B0C71 Diagnosis Process
Follow these systematic steps to accurately diagnose B0C71. 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 to test for voltage at the BCM and inspect related sensors (20-30 minutes)
Step 3: Component testing - Use a multimeter to test for voltage at the BCM and inspect related sensors (20-30 minutes).
Step 4: Step 4: Wiring inspection - Look for frayed wires or corrosion in connectors, which can disrupt communication (10-15 minutes)
Step 4: Wiring inspection - Look for frayed wires or corrosion in connectors, which can disrupt communication (10-15 minutes).
Step 5: Step 5: System function test - After repairs, verify proper operation and clear codes using GeekOBD APP (10-15 minutes)
Step 5: System function test - After repairs, verify proper operation and clear codes using GeekOBD APP (10-15 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: BCM Replacement in a 2017 Ford Explorer
Vehicle: 2017 Ford Explorer with 60,000 miles
Problem: Customer reported intermittent power door lock issues and flickering interior lights.
Diagnosis: After running diagnostics, B0C71 was found along with a visual inspection revealing corroded BCM connectors.
Solution: Replaced the body control module and cleaned the connectors to restore proper function.
Cost: $750 (including parts and labor)
Result: Post-repair, the vehicle operated normally with no further issues reported.
Case Study 2: Wiring Repair for B0C71 in a 2018 Ford Explorer
Vehicle: 2018 Ford Explorer with 45,000 miles
Problem: Driver experienced non-functioning dashboard lights and occasional check engine light.
Diagnosis: B0C71 was diagnosed through the GeekOBD APP, highlighting a wiring issue.
Solution: Repaired damaged wiring and reconnected the BCM.
Cost: $150 (including labor)
Result: The dashboard lights and other electrical systems returned to normal functionality.