B0745 - Understanding DTC B0745: Common Issues in 2010-2015 Ford Fusion and Other Models

Quick Answer

B0745 means: B0745 indicates a fault in the transmission range sensor circuit.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with B0745? Immediate attention is recommended to prevent transmission damage.

Common Questions

What does B0745 mean and how does it affect my car?

The B0745 code signifies an issue with the transmission range sensor's signal, which can lead to erratic shifting, decreased fuel efficiency, and potential transmission damage if not fixed promptly. Without proper signals, your vehicle may struggle to shift gears smoothly, impacting overall performance.

What are the most common causes of B0745 and how much does it cost to fix?

Common causes include a faulty transmission range sensor or damaged wiring. Repairing or replacing the sensor typically costs between $150 and $300, while wiring repairs can range from $100 to $200, depending on the extent of the damage.

Can I drive my car with B0745 or should I stop immediately?

It's advisable to avoid driving the car if you see the B0745 code, as it can lead to erratic shifting and potential transmission damage. Address the issue as soon as possible to prevent further complications.

How can I diagnose B0745 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform an OBD2 scan to retrieve the B0745 code and any related codes. The app allows you to view freeze frame data and perform real-time monitoring of the transmission parameters to identify the fault's context.

What vehicles are most commonly affected by B0745?

The B0745 code is frequently seen in 2010-2015 Ford Fusion models, but it can also affect other vehicles with similar transmission systems, including certain models from Chevrolet, Dodge, and Toyota.

How can I prevent B0745 from happening again?

Regular maintenance of your vehicle's transmission, including fluid checks and changes, can help prevent B0745 from occurring. Additionally, ensure that all wiring and connectors are in good condition to avoid electrical issues.

What is B0745?

The Diagnostic Trouble Code (DTC) B0745 indicates a fault in the transmission range sensor circuit, which is crucial for the automatic transmission's electronic control module (ECM). This code is commonly found in vehicles like the 2010-2015 Ford Fusion, but it can also affect various other makes and models with automatic transmissions. When the B0745 code is triggered, it typically means that the ECM has detected an incorrect signal from the transmission range sensor, which tells the vehicle's computer what gear the transmission is in. This information is essential for optimal gear shifting and overall vehicle performance. If this code appears, it might lead to poorer fuel efficiency, erratic shifting, and potential transmission damage if left unaddressed. Car owners might notice the check engine light illuminating on their dashboard, and they may experience issues such as slipping gears or delayed engagement when shifting from park to drive. Addressing the B0745 code promptly is critical to ensure the longevity and reliability of the vehicle’s transmission system.

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

Symptoms

Common symptoms when B0745 is present:

  • The check engine light stays on constantly, indicating a persistent issue that needs immediate attention.
  • Drivers may experience erratic shifting, where the car hesitates or shifts unexpectedly, which can lead to a frustrating driving experience.
  • Fuel economy may decrease significantly, typically by 10-15%, as the engine struggles to operate efficiently due to faulty transmission signals.
  • Unusual noises during shifting, such as grinding or clunking, which indicate potential internal transmission problems.
  • Delayed engagement when shifting from park to drive, which can pose safety risks in traffic.

Possible Causes

Most common causes of B0745 (ordered by frequency):

  1. The most common cause of the B0745 code is a faulty transmission range sensor, which has a likelihood of about 60%. This sensor can wear out over time, leading to incorrect signals sent to the ECM.
  2. Another potential cause is damaged wiring or connectors in the transmission range sensor circuit, which can lead to intermittent faults. Inspecting these connections is crucial for proper diagnosis.
  3. Additionally, low transmission fluid levels or dirty fluid can impact sensor performance. Regular fluid checks and changes can help prevent this issue.
  4. Less common but serious causes include a failing transmission control module (TCM), which may need replacement or reprogramming.
  5. A rare cause could be internal transmission failure, which could manifest as more severe symptoms and require comprehensive repairs or a rebuild.

B0745 Repair Costs

Cost Breakdown by Repair Type

Transmission Range Sensor Replacement

Replacing the faulty transmission range sensor to restore proper function.

  • Total: $150 - $300
  • Success rate: 85%
Wiring and Connector Repair

Repairing or replacing damaged wiring and connectors in the sensor circuit.

  • Total: $100 - $200
  • Success rate: 75%
Money-Saving Tips for B0745
  • 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 B0745 Diagnosis Process

Follow these systematic steps to accurately diagnose B0745. 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).

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 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).

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 suspected components like the transmission range sensor (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components like the transmission range sensor (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 after repairs and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (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 repair success and ensure the code does not reappear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the code does not reappear (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: Transmission Range Sensor Replacement on a 2013 Ford Fusion

Vehicle: 2013 Ford Fusion, 75,000 miles

Problem: The customer reported erratic shifting and frequent check engine light illumination.

Diagnosis: After scanning with the GeekOBD APP, B0745 was retrieved along with some other codes. A visual inspection revealed a worn-out transmission range sensor.

Solution: Replaced the faulty transmission range sensor and cleared the codes.

Cost: $250 (sensor $150, labor $100)

Result: Post-repair, the vehicle shifted smoothly, and the check engine light remained off after several test drives.

Case Study 2: Wiring Repair on a 2012 Dodge Charger

Vehicle: 2012 Dodge Charger, 85,000 miles

Problem: The driver experienced delayed engagement and a check engine light for several weeks.

Diagnosis: Using the GeekOBD APP, the B0745 code was confirmed. A thorough inspection showed frayed wiring in the transmission range sensor circuit.

Solution: Repaired the wiring and connectors, then cleared the codes.

Cost: $180 (wiring repair $100, labor $80)

Result: The symptoms were resolved, and the vehicle operated normally after the repair.

Diagnose B0745

Use GeekOBD APP for professional diagnosis!

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

Code: B0745
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes