B0714 - DTC B0714: Understanding Transmission Control Module (TCM) Communication Issues in 2015-2018 Honda Civic and More

Quick Answer

B0714 means: B0714 indicates a communication issue between the Transmission Control Module (TCM) and other systems.

Fix: Check and replace faulty components Cost: $800 - $1,500 Time: 90-180 minutes

Can I drive with B0714? Immediate attention is advised as it can lead to transmission failure.

Common Questions

What does B0714 mean and how does it affect my car?

B0714 indicates a problem with communication between the Transmission Control Module (TCM) and other systems in your vehicle. If this issue is not fixed, it can lead to erratic shifting and potentially severe transmission damage over time, affecting your car's performance and safety.

What are the most common causes of B0714 and how much does it cost to fix?

The most common cause is a faulty TCM, which can cost between $800 and $1,500 to replace. Other causes include damaged wiring or poor connections, which may range from $150 to $500 to repair. Regular diagnostics can help catch these issues early.

Can I drive my car with B0714 or should I stop immediately?

While you may be able to drive your car for a short distance, it is not recommended. Driving with a B0714 code can lead to transmission failure, posing safety risks. It's best to address this issue promptly.

How can I diagnose B0714 myself using GeekOBD APP?

To diagnose B0714 using the GeekOBD APP, start by connecting the app to your vehicle's OBD2 port. Scan for diagnostic trouble codes and review the freeze frame data. This will give you context on when the error occurred, helping you pinpoint the issue.

What vehicles are most commonly affected by B0714?

Common vehicles affected by B0714 include the 2015-2018 Honda Civic, Ford Fusion, and Nissan Altima. These models often experience TCM communication issues, and if your vehicle falls within these ranges, it's wise to stay vigilant about this code.

How can I prevent B0714 from happening again?

To prevent future occurrences of B0714, ensure regular maintenance of your vehicle's electrical systems, keep software updated, and perform routine inspections of wiring and connectors, especially if you drive in harsh conditions.

What is B0714?

The Diagnostic Trouble Code (DTC) B0714 indicates a communication issue between the Transmission Control Module (TCM) and other vehicle control modules. This code is particularly common in vehicles like the 2015-2018 Honda Civic, but it can also appear in various models from manufacturers such as Ford, Chevrolet, and Nissan. When the TCM fails to communicate properly, it can lead to erratic shifting, reduced power, or even engine stalling. The TCM is vital for managing the transmission's functions, which affects vehicle performance and fuel efficiency. If left unresolved, this code can lead to more significant transmission issues, increasing repair costs over time. Drivers may notice symptoms such as an illuminated check engine light, unusual shifting patterns, or difficulties in acceleration. It’s crucial to address the B0714 code promptly to maintain optimal vehicle performance and avoid potential safety hazards on the road.

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

Symptoms

Common symptoms when B0714 is present:

  • The check engine light illuminates and remains on, indicating a fault that needs attention.
  • You might experience erratic or harsh shifting while driving, making it difficult to accelerate smoothly.
  • Fuel efficiency could decrease by 10-15%, leading to more frequent trips to the gas station.
  • The transmission may go into 'limp mode', limiting vehicle speed and power to protect the engine.
  • In some cases, you may hear unusual noises from the transmission or experience engine stalling.

Possible Causes

Most common causes of B0714 (ordered by frequency):

  1. The most common cause is a faulty Transmission Control Module (TCM), which has a likelihood of about 60%. If the TCM fails, it can interrupt communication with other modules, leading to the B0714 code.
  2. Another common cause is damaged wiring or poor connections, accounting for roughly 25% of cases. Corrosion or wear on the wiring harness can cause intermittent communication issues.
  3. A third possible cause is software issues within the TCM, which can sometimes be resolved with a simple reprogramming. Keeping the vehicle’s software up to date can prevent this problem.
  4. Less common but serious causes include a complete failure of the transmission system, leading to a significant repair that could cost thousands.
  5. A rare cause might be a malfunctioning engine control module (ECM), which can interfere with TCM operations.

B0714 Repair Costs

Cost Breakdown by Repair Type

TCM Replacement

Replacing a faulty Transmission Control Module often resolves B0714 issues.

  • Total: $800 - $1,500
  • Success rate: 90%
Wiring Repair

Repairing damaged wiring or connectors can also resolve the issue.

  • Total: $150 - $500
  • Success rate: 70%
Money-Saving Tips for B0714
  • 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 B0714 Diagnosis Process

Follow these systematic steps to accurately diagnose B0714. 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, including the TCM and wiring (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, including the TCM and wiring (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 to see if they return (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes to see if they return (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 (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success (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: Successful TCM Replacement on 2016 Honda Civic

Vehicle: 2016 Honda Civic, 45,000 miles

Problem: Customer reported erratic shifting and check engine light on.

Diagnosis: After scanning with GeekOBD APP, B0714 was identified. A visual inspection showed corroded wiring and a malfunctioning TCM.

Solution: Replaced the TCM and repaired the wiring harness.

Cost: $1,200 (Parts: $800 for TCM, $400 for labor)

Result: Customer reported smooth shifting and improved vehicle performance post-repair.

Case Study 2: Wiring Repair on 2017 Ford Fusion

Vehicle: 2017 Ford Fusion, 30,000 miles

Problem: Check engine light illuminated with transmission issues.

Diagnosis: B0714 was present. Further inspection revealed damaged wiring in the harness.

Solution: Repaired wiring connections and cleared the codes.

Cost: $300 (Parts: $50 for wiring, $250 for labor)

Result: Vehicle operated normally with no further issues.

Diagnose B0714

Use GeekOBD APP for professional diagnosis!

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  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: B0714
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes