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P0791 Dodge Code - Transfer Speed Sensor Circuit

Quick Answer

The P0791 diagnostic trouble code for Dodge vehicles refers to an issue with the Transfer Speed Sensor Circuit. Common causes include Faulty transfer speed sensor, Damaged wiring or connectors in the transfer speed sensor circuit, Corrosion or debris affecting the sensor's performance. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0791 Dodge indicates Transfer Speed Sensor Circuit.
Common causes
Common causes include Faulty transfer speed sensor, Damaged wiring or connectors in the transfer speed sensor circuit, Corrosion or debris affecting the sensor's performance.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P0791 Dodge Description

The P0791 diagnostic trouble code for Dodge vehicles refers to an issue with the Transfer Speed Sensor Circuit. This code indicates that there is a problem with the transfer case speed sensor, which is responsible for monitoring the speed of the transfer case input shaft. The transfer case is an essential component in four-wheel drive and all-wheel drive vehicles, as it allows the vehicle to switch between two-wheel drive and four-wheel drive modes.

OBDII Code P0791 Dodge - Transfer Speed Sensor Circuit
P0791 Dodge Code - Transfer Speed Sensor Circuit

Common Causes of P0791 Dodge

  1. Faulty transfer speed sensor.
  2. Damaged wiring or connectors in the transfer speed sensor circuit.
  3. Corrosion or debris affecting the sensor's performance.
  4. Issues with the transfer case control module.
  5. Electrical problems within the vehicle's system.

Symptoms of P0791 Dodge

  1. Difficulty shifting between two-wheel drive and four-wheel drive modes.
  2. Transmission slipping or harsh shifting.
  3. Inaccurate speedometer readings.
  4. Illumination of the Check Engine Light.
  5. Loss of power or decreased fuel efficiency.

How to Fix P0791 Dodge

  1. Begin by conducting a thorough inspection of the transfer speed sensor and its wiring connectors to check for any visible damage or corrosion.
  2. Test the transfer speed sensor using a multimeter to determine if it is functioning correctly.
  3. If the sensor is faulty, replace it with a new sensor following the manufacturer's instructions.
  4. Clear the diagnostic trouble codes from the vehicle's computer using an OBD-II scanner.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the transfer case is functioning properly.

Cost to Fix P0791 Dodge

The typical repair costs for addressing the P0791 code on a Dodge vehicle can vary depending on the specific model and year of the vehicle, as well as the location and labor rates of the auto repair shop. On average, the cost of replacing a transfer speed sensor can range from $150 to $300, including parts and labor. However, additional diagnostic time and labor costs may apply, so it's advisable to consult with a professional technician for a more accurate estimate. Keep in mind that rates at dealerships or in metropolitan areas may be higher, while independent shops may offer more affordable prices.

When is the Code Detected?

P0791 code is detected when there is an excessive change in the transfer rpm in any gear

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0791 Dodge Code

1. What are the common symptoms of OBDII code P0791 in a Dodge related to the Transfer Speed Sensor Circuit?

- Common symptoms include issues with shifting, erratic speedometer readings, and the illumination of the Check Engine Light.

2. What typically causes the OBDII code P0791 in a Dodge related to the Transfer Speed Sensor Circuit?

- The code is usually triggered by a faulty transfer speed sensor, damaged wiring or connectors, or issues with the transmission control module.

3. How can I diagnose the OBDII code P0791 in my Dodge related to the Transfer Speed Sensor Circuit?

- Diagnosis involves using a scan tool to read the code, inspecting the transfer speed sensor and related wiring, and testing the sensor's resistance and output signal.

4. Can I continue driving my Dodge with OBDII code P0791 related to the Transfer Speed Sensor Circuit?

- It is not recommended to drive the vehicle with this code present, as it can lead to further transmission issues and potential safety hazards.

5. What are some repair tips for fixing OBDII code P0791 in a Dodge related to the Transfer Speed Sensor Circuit?

- Repair tips include replacing the transfer speed sensor, repairing any damaged wiring or connectors, and resetting the fault code to see if it reoccurs.

6. Is it possible to reset the OBDII code P0791 related to the Transfer Speed Sensor Circuit without making any repairs?

- While clearing the code may temporarily turn off the Check Engine Light, it is essential to address the underlying issue causing the code to prevent further problems.

7. How much does it typically cost to repair OBDII code P0791 related to the Transfer Speed Sensor Circuit in a Dodge?

- The cost can vary depending on the specific cause of the code, but it may involve parts and labor expenses ranging from $100 to $400 or more.

8. Can a DIY enthusiast with automotive skills fix OBDII code P0791 related to the Transfer Speed Sensor Circuit in a Dodge?

- Depending on the individual's expertise, replacing the transfer speed sensor or repairing wiring connections may be manageable for a DIY enthusiast with the necessary tools and knowledge.

9. Will OBDII code P0791 in a Dodge related to the Transfer Speed Sensor Circuit affect fuel efficiency?

- While the code itself may not directly impact fuel efficiency, unresolved transmission issues can lead to poor performance and potentially affect fuel economy over time.

10. How urgent is it to address OBDII code P0791 related to the Transfer Speed Sensor Circuit in a Dodge?

- It is recommended to address the code promptly to prevent further damage to the transmission system and ensure the vehicle operates safely and efficiently.

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