B073A - Transmission Fluid Temperature Sensor Range/Performance Problem in Common Vehicles

Quick Answer

B073A means: B073A indicates problems with the Transmission Fluid Temperature Sensor's performance.

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

Can I drive with B073A? Immediate attention is recommended to avoid transmission damage.

Common Questions

What does B073A mean and how does it affect my car?

The B073A code indicates a problem with the transmission fluid temperature sensor, which could lead to poor vehicle performance and potential transmission damage if not resolved promptly.

What are the most common causes of B073A and how much does it cost to fix?

Common causes include a faulty TFT sensor, damaged wiring, and low fluid levels. Repair costs typically range from $150 to $300 for sensor replacement, while wiring repairs may cost $100 to $250.

Can I drive my car with B073A or should I stop immediately?

Driving with the B073A code is risky as it can lead to severe transmission damage. It's best to have the issue diagnosed and repaired as soon as possible.

How can I diagnose B073A myself using GeekOBD APP?

You can diagnose B073A using the GeekOBD APP by connecting it to your vehicle's OBD2 port, running a scan to retrieve the code, and checking the freeze frame data for more context.

What vehicles are most commonly affected by B073A?

B073A is commonly found in vehicles like the 2013-2017 Ford Fusion and 2014-2018 Chevrolet Malibu, among others. Always check for any recalls or technical service bulletins (TSBs) related to your specific vehicle.

How can I prevent B073A from happening again?

Regular maintenance, including timely fluid changes and inspections of the transmission system, can help prevent B073A. Be vigilant for any signs of transmission problems.

What is B073A?

The diagnostic trouble code (DTC) B073A indicates a problem with the Transmission Fluid Temperature Sensor (TFT) range or performance, which is crucial for your vehicle's automatic transmission system. This code often appears in several makes and models, including the 2013-2017 Ford Fusion and 2014-2018 Chevrolet Malibu. When this code is triggered, it typically signifies that the Transmission Control Module (TCM) has detected a reading from the TFT that is outside the expected range. The TFT sensor's primary role is to monitor the temperature of the transmission fluid, ensuring it remains within optimal operating conditions. If the fluid gets too hot, it can lead to serious transmission issues, including slipping, erratic shifting, or even total transmission failure. Additionally, if the sensor provides inaccurate readings, it can negatively affect the engine's performance and fuel efficiency. It's important to address this issue promptly, as neglecting it could lead to costly repairs down the line. Regular maintenance, including checking fluid levels and conditions, can help prevent this issue from arising in the first place.

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

Symptoms

Common symptoms when B073A is present:

  • The check engine light may illuminate, indicating a fault in the transmission system, which could also lead to reduced engine performance.
  • Drivers may experience harsh or delayed shifts when changing gears, suggesting issues with transmission fluid temperature readings.
  • You might notice unusual transmission behavior, such as slipping or unexpected downshifting, which can affect drivability.
  • Fuel efficiency could decline, often by 10-20%, as the transmission may not operate within its optimal parameters.
  • In some cases, the vehicle may enter 'limp mode,' where the engine's power is significantly reduced to prevent further damage.

Possible Causes

Most common causes of B073A (ordered by frequency):

  1. The most common cause of B073A is a faulty Transmission Fluid Temperature Sensor, which accounts for about 60% of cases. This can occur due to wear and tear or exposure to high temperatures.
  2. A second significant cause can be poor electrical connections or damaged wiring within the transmission system, leading to incorrect signals being sent to the TCM.
  3. Thirdly, low or contaminated transmission fluid can affect the TFT's ability to function correctly. Regular fluid changes can help prevent this.
  4. Less commonly, a failing Transmission Control Module may misinterpret sensor readings, but this is a serious issue that requires immediate professional diagnosis.
  5. Lastly, external factors such as changes in ambient temperature or coolant leaks can also impact sensor performance, although these are rare.

B073A Repair Costs

Cost Breakdown by Repair Type

Transmission Fluid Temperature Sensor Replacement

Replacing the faulty TFT sensor to restore proper temperature readings.

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

Repairing or replacing damaged wiring or connectors affecting the TFT sensor.

  • Total: $100 - $250
  • Success rate: 75%
Transmission Fluid Change

Changing the transmission fluid to prevent damage and ensure optimal performance.

  • Total: $80 - $150
  • Success rate: 90%
Money-Saving Tips for B073A
  • 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 B073A Diagnosis Process

Follow these systematic steps to accurately diagnose B073A. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Begin with a visual inspection of the transmission system for any damaged wiring, loose connections, or signs of fluid leaks (5-10 minutes)

Step 1: Begin with a visual inspection of the transmission system for any damaged wiring, loose connections, or signs of fluid leaks (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: Use the GeekOBD APP to perform an OBD2 scan, retrieving all stored codes and freeze frame data to get a better context of the fault (10-15 minutes)

Step 2: Use the GeekOBD APP to perform an OBD2 scan, retrieving all stored codes and freeze frame data to get a better context of the fault (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: Conduct component testing using a multimeter to check the resistance of the Transmission Fluid Temperature Sensor (20-30 minutes)

Step 3: Conduct component testing using a multimeter to check the resistance of the Transmission Fluid Temperature 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: After repairs, perform a system function test to ensure the sensor is providing accurate readings and clear any fault codes (10-15 minutes)

Step 4: After repairs, perform a system function test to ensure the sensor is providing accurate readings and clear any fault codes (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: Finally, conduct a road test to verify proper transmission operation under various driving conditions (15-20 minutes)

Step 5: Finally, conduct a road test to verify proper transmission operation under various driving conditions (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 Fluid Temperature Sensor Replacement in a 2015 Ford Fusion

Vehicle: 2015 Ford Fusion, 75,000 miles

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

Diagnosis: After scanning with the GeekOBD APP and conducting component tests, the TFT sensor was found defective.

Solution: Replaced the faulty TFT sensor and flushed the transmission fluid.

Cost: $280 (sensor: $200, fluid change: $80)

Result: Post-repair, the vehicle shifted smoothly and the check engine light was cleared.

Case Study 2: Wiring Repair in a 2016 Chevrolet Malibu

Vehicle: 2016 Chevrolet Malibu, 65,000 miles

Problem: Customer experienced erratic shifting and intermittent check engine light.

Diagnosis: Diagnostic steps revealed damaged wiring leading to the TFT sensor.

Solution: Repaired the wiring harness and replaced the connectors.

Cost: $180 (wiring repair: $130, labor: $50)

Result: The vehicle's transmission performance improved significantly after the repairs.

Diagnose B073A

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: B073A
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes