B0E46 - Understanding the Diagnostic Trouble Code for 2017-2021 Ford F-250 and F-350 Models

Quick Answer

B0E46 means: B0E46 indicates a fault with the Body Control Module related to the vehicle's lighting system.

Fix: Check and replace faulty components Cost: $400 - $800 Time: 90-180 minutes

Can I drive with B0E46? Immediate attention is recommended to prevent safety hazards.

Common Questions

What does B0E46 mean and how does it affect my car?

The B0E46 code indicates a problem with the Body Control Module that affects the vehicle's lighting system. This can lead to malfunctioning turn signals or headlights, posing safety risks while driving. If left unresolved, it could lead to more extensive electrical issues.

What are the most common causes of B0E46 and how much does it cost to fix?

Common causes include a faulty Body Control Module, damaged wiring, or corroded connectors. Repair costs can range from $50 for relay replacements to $800 for complete BCM replacement. Labor costs can vary based on location and service provider.

Can I drive my car with B0E46 or should I stop immediately?

It's best to address the B0E46 code as soon as possible. Driving with a malfunctioning lighting system can create hazardous conditions for you and other drivers. If you notice symptoms like flickering lights or dashboard warnings, stop and have your vehicle inspected.

How can I diagnose B0E46 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform a diagnostic scan to retrieve the B0E46 code. Look for freeze frame data to understand the context of the fault. Follow the steps to perform visual inspections and check for any visible issues with your vehicle's wiring or BCM.

What vehicles are most commonly affected by B0E46?

The B0E46 code is frequently found in 2017-2021 Ford F-250 and F-350 models. If you own one of these vehicles, be aware of this code and its potential implications on the electrical system.

How can I prevent B0E46 from happening again?

Regular maintenance is key to preventing B0E46. Ensure your vehicle's electrical systems are inspected during routine services, especially in areas with high humidity or road salt. Keeping connectors clean and protected from moisture can also help.

What is B0E46?

The B0E46 code is a manufacturer-specific trouble code that primarily affects 2017-2021 Ford F-250 and F-350 models. This code relates to issues within the Body Control Module (BCM), specifically indicating a fault in the vehicle's lighting system, often linked to the turn signal or hazard lights. When the BCM detects an abnormality in the circuit, such as a short or open circuit, it triggers this code. The implications of B0E46 can range from minor inconveniences, like malfunctioning turn signals, to serious safety risks if the vehicle's lighting system fails completely. Drivers may notice symptoms like flickering lights, non-functioning signals, or even the dashboard warning lights coming on. Ignoring this code can lead to further electrical issues and potential failures of other systems, making timely diagnosis and repair crucial. While a DIY enthusiast might find some steps manageable, it’s often best to consult a professional technician who can use advanced diagnostic tools to ensure a thorough inspection and repair.

System: B - Body (Airbags, Lighting, Security, Climate Control)

Symptoms

Common symptoms when B0E46 is present:

  • The check engine light remains illuminated, indicating an underlying issue with the vehicle's electrical systems.
  • Turn signals flicker or fail to operate entirely, reducing visibility and safety during lane changes.
  • Dashboard warning lights, including the ABS or traction control lights, may illuminate, suggesting broader electrical issues.
  • Inconsistent lighting performance where headlights or taillights may dim or fail intermittently.
  • Unexpected horn activation or malfunction of interior lights, indicating electrical gremlins within the BCM.

Possible Causes

Most common causes of B0E46 (ordered by frequency):

  1. The most common cause of the B0E46 code is a faulty Body Control Module, which can account for about 60% of cases. This may occur due to wear, moisture ingress, or electrical shorts.
  2. Another prevalent issue is damaged wiring or connectors in the lighting circuit, which can lead to intermittent faults and is likely in vehicles subjected to harsh environmental conditions.
  3. Corrosion at connector terminals can also trigger this code. Regular maintenance, including inspecting and cleaning electrical connectors, can prevent this.
  4. A less common but serious cause could be a malfunctioning relay within the lighting system, which can disrupt the operation of multiple lighting components.
  5. Rarely, software glitches in the BCM may cause false readings, necessitating a software update or reprogramming of the module.

B0E46 Repair Costs

Cost Breakdown by Repair Type

BCM Replacement

Replacing the Body Control Module with a new unit.

  • Total: $400 - $800
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring and connectors.

  • Total: $100 - $300
  • Success rate: 75%
Relay Replacement

Replacing faulty relays that control the lighting system.

  • Total: $50 - $100
  • Success rate: 90%
Money-Saving Tips for B0E46
  • 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 B0E46 Diagnosis Process

Follow these systematic steps to accurately diagnose B0E46. 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 in the BCM and associated circuits (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion in the BCM and associated circuits (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan using the GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan using the GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes). Look for any additional codes that may provide more insight.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the BCM and related components, ensuring they function within manufacturer specifications (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the BCM and related components, ensuring they function within manufacturer specifications (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify proper operation of the lighting system after any repairs and clear codes from the OBD2 system (10-15 minutes)

Step 4: System function test - Verify proper operation of the lighting system after any repairs and clear codes from the OBD2 system (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the lighting system operates correctly and that the B0E46 code does not return (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the lighting system operates correctly and that the B0E46 code does not return (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

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 2018 Ford F-350

Vehicle: 2018 Ford F-350, 45,000 miles

Problem: Customer reported that the turn signals were flickering and dashboard warning lights were on.

Diagnosis: After performing an OBD2 scan with GeekOBD APP, the B0E46 code was retrieved. Visual inspection revealed corrosion in the BCM connectors.

Solution: Replaced the Body Control Module and cleaned all connectors. Conducted a system function test to ensure proper operation.

Cost: $650 (parts: $500 for BCM, $150 for labor)

Result: All lighting functions returned to normal. No further issues reported.

Case Study 2: Wiring Repair for a 2019 Ford F-250

Vehicle: 2019 Ford F-250, 30,000 miles

Problem: Owner noticed intermittent lighting issues and dashboard alerts.

Diagnosis: Diagnostics showed B0E46 after scanning with GeekOBD APP. Inspections revealed damaged wiring harness due to wear.

Solution: Repaired the wiring and replaced corroded connectors. Cleared codes and confirmed system functionality.

Cost: $250 (parts: $100 for wiring, $150 for labor)

Result: Resolved the issue with no subsequent reports of lighting problems.

Diagnose B0E46

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: B0E46
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes