B0730 - Transmission Fluid Temperature Sensor Circuit Range/Performance Problem in Ford and Dodge Vehicles

Quick Answer

B0730 means: B0730 means there's an issue with the transmission fluid temperature sensor circuit, which can affect transmission performance.

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

Can I drive with B0730? Address immediately to prevent severe damage to your transmission.

Common Questions

What does B0730 mean and how does it affect my car?

The B0730 code indicates an issue with your transmission fluid temperature sensor. This sensor is vital for proper transmission function, as it helps regulate fluid temperature for efficient shifting. If this code appears, your vehicle may experience erratic shifting, decreased fuel efficiency, or even transmission overheating. It's essential to address this issue quickly to prevent further damage.

What are the most common causes of B0730 and how much does it cost to fix?

The most common cause of B0730 is a faulty transmission fluid temperature sensor, which can cost between $150 and $300 to replace. Other causes include wiring issues and TCM failures, with repair costs varying from $100 to $1,200 depending on the specific problem. Diagnosing the issue accurately can save you money in the long run.

Can I drive my car with B0730 or should I stop immediately?

While it may be possible to drive your car with code B0730, it is not advisable. Continuing to drive can lead to significant transmission damage, which can be costly to repair. If the check engine light is on and you experience shifting issues, it's best to have your vehicle inspected as soon as possible.

How can I diagnose B0730 myself using GeekOBD APP?

To diagnose B0730 using the GeekOBD APP, connect the app to your vehicle's OBD2 port. Use the app to scan for trouble codes and view freeze frame data. Pay attention to the transmission fluid temperature readings. If the readings are erratic, it may indicate a faulty sensor. Follow the app's troubleshooting steps for further guidance.

What vehicles are most commonly affected by B0730?

The B0730 code is frequently seen in various Ford models like the F-150 (2004-2014) and Dodge vehicles such as the Ram 1500 (2006-2018). These vehicles may have specific recalls or technical service bulletins (TSBs) related to transmission issues, so it's good to check with your dealer.

How can I prevent B0730 from happening again?

To prevent B0730 from recurring, regularly maintain your vehicle's transmission by changing the fluid as recommended in your owner's manual and checking for leaks or wiring issues. Use quality transmission fluid and have your vehicle inspected by a professional if you notice any symptoms like shifting problems or warning lights.

What is B0730?

The diagnostic trouble code (DTC) B0730 indicates a problem related to the transmission fluid temperature sensor circuit. This code is often seen in various vehicle makes, particularly in certain Ford and Dodge models from around 2005 to 2018. When you receive this code, it usually means that the transmission control module (TCM) has detected that the signal from the transmission fluid temperature sensor is either out of range or performing erratically. This sensor plays a vital role in ensuring that the transmission operates at the correct temperature for smooth shifting and optimal performance. If the transmission fluid is too hot or too cold, it can lead to poor shifting behavior, increased wear on transmission components, and even complete transmission failure if not addressed promptly. Ignoring this code can lead to more severe issues, including overheating and potential transmission breakdown, which could be costly to repair. Therefore, understanding what this code means and how to address it is crucial for maintaining the longevity and performance of your vehicle.

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

Symptoms

Common symptoms when B0730 is present:

  • Check engine light illuminates on the dashboard, remaining lit until the issue is resolved.
  • Transmission shifts erratically or harshly, leading to a noticeable jolt during gear changes.
  • Fuel efficiency decreases significantly, often by 10-20%, due to improper transmission operation.
  • Transmission may overheat, leading to a burning smell or fluid leak under the vehicle.
  • Unusual noises, such as grinding or whining, may be heard during shifting, indicating internal issues.

Possible Causes

Most common causes of B0730 (ordered by frequency):

  1. Faulty transmission fluid temperature sensor (70% likelihood) - This is the most common issue, where the sensor fails to provide accurate readings.
  2. Wiring issues (15% likelihood) - Damaged or corroded wiring can disrupt the signal between the sensor and the TCM, causing inaccurate readings.
  3. Faulty transmission control module (10% likelihood) - If the TCM itself is malfunctioning, it may misinterpret the signal from the sensor.
  4. Overheating transmission (5% likelihood) - If the transmission is running too hot due to other issues, it can cause this code to trigger.
  5. Fluid contamination (rare) - Contaminated transmission fluid can affect sensor performance and lead to erratic shifting.

B0730 Repair Costs

Cost Breakdown by Repair Type

Sensor Replacement

Replacing the faulty transmission fluid temperature sensor, often the primary solution for code B0730.

  • Total: $150 - $300
  • Success rate: 90%
Wiring Repair

Repairing or replacing damaged wiring or connectors that may be causing the issue.

  • Total: $100 - $200
  • Success rate: 80%
TCM Replacement

Replacing the transmission control module if it is determined to be faulty.

  • Total: $500 - $1,200
  • Success rate: 70%
Money-Saving Tips for B0730
  • 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 B0730 Diagnosis Process

Follow these systematic steps to accurately diagnose B0730. 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 - Use the app to retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the app to 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 to test the transmission fluid temperature sensor and check for proper voltage (20-30 minutes)

Step 3: Component testing - Use a multimeter to test the transmission fluid temperature sensor and check for proper voltage (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, ensuring the sensor provides accurate readings and clear codes (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs, ensuring the sensor provides accurate readings and clear 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: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for warning lights (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for warning lights (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 Temperature Sensor Replacement in 2015 Ford F-150

Vehicle: 2015 Ford F-150, 45,000 miles

Problem: Customer reported a check engine light and rough shifting when accelerating.

Diagnosis: After scanning for codes with GeekOBD, B0730 was confirmed. Visual inspection showed a damaged temperature sensor.

Solution: Replaced the faulty transmission fluid temperature sensor and cleared the trouble codes.

Cost: $200 (including parts and labor)

Result: Check engine light turned off, and the customer reported smoother shifting afterward.

Case Study 2: Wiring Repair for B0730 in 2013 Dodge Ram 1500

Vehicle: 2013 Dodge Ram 1500, 60,000 miles

Problem: Customer experienced harsh shifts and check engine light illumination.

Diagnosis: Diagnostic scan revealed B0730. Wiring inspection showed corrosion at the sensor connector.

Solution: Repaired the wiring and replaced the connector to restore proper function.

Cost: $150 (specific cost breakdown: $50 for parts, $100 for labor)

Result: Transmission operated smoothly after repairs, and no further issues were reported.

Diagnose B0730

Use GeekOBD APP for professional diagnosis!

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

Code: B0730
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes