Engine-Codes.com
Engine-Codes – Generic – P0794

P0794 Code - Intermediate Shaft Speed Sensor 'A' Circuit Intermittent

Quick Answer

The P0794 diagnostic trouble code (DTC) refers to the Intermediate Shaft Speed Sensor 'A' Circuit Intermittent. Common causes include Faulty intermediate shaft speed sensor, Loose or damaged wiring/connectors in the sensor circuit, Corrosion or debris affecting sensor operation. 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
P0794 indicates Intermediate Shaft Speed Sensor 'A' Circuit Intermittent.
Common causes
Common causes include Faulty intermediate shaft speed sensor, Loose or damaged wiring/connectors in the sensor circuit, Corrosion or debris affecting sensor operation.
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 15, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0794 Description

The P0794 diagnostic trouble code (DTC) refers to the Intermediate Shaft Speed Sensor 'A' Circuit Intermittent. This code indicates that there is an intermittent issue with the intermediate shaft speed sensor in the vehicle's transmission system. The intermediate shaft speed sensor is responsible for monitoring the speed of the intermediate shaft in the transmission, providing crucial data to the vehicle's engine control module (ECM) for proper operation.

OBDII Code P0794 - Intermediate Shaft Speed Sensor 'A' Circuit Intermittent
P0794 Code - Intermediate Shaft Speed Sensor 'A' Circuit Intermittent

Common Causes of P0794

  1. Faulty intermediate shaft speed sensor
  2. Loose or damaged wiring/connectors in the sensor circuit
  3. Corrosion or debris affecting sensor operation
  4. ECM software issues
  5. Transmission fluid contamination or low fluid levels

Symptoms of P0794

  1. Erratic shifting or delayed gear changes
  2. Rough acceleration or jerking movements while driving
  3. Decreased fuel efficiency
  4. Transmission slipping or difficulty engaging gears
  5. Illumination of the Check Engine Light

How to Fix P0794

  1. Diagnose the issue by using a scan tool to retrieve the DTC and inspect the intermediate shaft speed sensor and its circuit.
  2. Check the wiring and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the intermediate shaft speed sensor for proper operation and replace if faulty.
  4. Clear the DTC from the ECM memory and perform a test drive to ensure the issue has been resolved.
  5. Monitor the vehicle for any recurring symptoms and recheck the sensor's operation if needed.

Cost to Fix P0794

The typical repair costs for addressing a P0794 code can vary depending on the specific vehicle make and model, as well as the labor rates in the area. On average, the parts for replacing an intermediate shaft speed sensor can range from $100 to $300, while the labor costs can be around $100 to $200. Overall, the total repair cost for this issue may fall between $200 and $500. It is advisable to consult with a local auto repair shop for a more accurate estimate based on the vehicle's specific requirements and the technician's labor rates.

Need more information about the P0794 code?

Need more information on how to fix the P0794 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0794 code diagnosed by a professional: Find a repair shop in your area

Code P0794 Information for Specific Makes

  • P0794 Mazda — Intermediate Shaft Speed Sensor 'A' Circuit Intermittent
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 P0794 Code

1. What are the common symptoms of OBDII code P0794?

The common symptoms of OBDII code P0794 include intermittent or complete loss of transmission shifting, erratic or harsh shifting, and the transmission going into limp mode.

2. What causes OBDII code P0794 to trigger?

OBDII code P0794 is typically triggered by a faulty intermediate shaft speed sensor or issues with the sensor circuit, such as wiring problems, loose connections, or sensor malfunctions.

3. How can I diagnose the cause of OBDII code P0794?

Diagnosing OBDII code P0794 involves using a scan tool to retrieve the code, inspecting the intermediate shaft speed sensor and its wiring for damage, testing the sensor's resistance, and checking for proper voltage and ground connections.

4. Can a DIYer repair OBDII code P0794 at home?

Repairing OBDII code P0794 at home is possible for those with automotive repair experience. Replacing the intermediate shaft speed sensor, repairing wiring or connections, and clearing the code with a scan tool are typical steps involved in fixing this issue.

5. What are the repair options for OBDII code P0794?

Repair options for OBDII code P0794 include replacing the faulty intermediate shaft speed sensor, repairing any damaged wiring or connectors, ensuring proper sensor installation, and clearing the trouble code to reset the system.

6. Is it safe to continue driving with OBDII code P0794 present?

It is not recommended to continue driving with OBDII code P0794 present, as it can lead to further transmission issues and potential safety hazards. It is best to address the problem promptly to prevent more severe damage.

7. Can weather or road conditions affect OBDII code P0794?

Extreme weather conditions or rough road conditions can potentially impact the performance of the intermediate shaft speed sensor and trigger OBDII code P0794. Ensuring the sensor is properly shielded and protected can help prevent such issues.

8. How long does it typically take to repair OBDII code P0794?

The repair time for OBDII code P0794 can vary depending on the extent of the issue and the repairer's experience. In general, it may take a few hours to a day to diagnose, repair, and clear the trouble code associated with this problem.

9. Are there any preventive measures to avoid OBDII code P0794 in the future?

Regular maintenance of the transmission system, including checking the condition of sensors and wiring, can help prevent OBDII code P0794 from occurring. Ensuring timely repairs of any transmission-related issues can also reduce the likelihood of this code appearing.

10. Can OBDII code P0794 be a recurring issue even after repair?

If the root cause of OBDII code P0794 is not properly addressed during the repair process, it can potentially recur. It is essential to diagnose the issue accurately, use quality replacement parts, and follow proper repair procedures to minimize the chances of the problem resurfacing.

Discuss the causes and fixes for P0794 OBDII Code

Submit a New Comment

Code P0794 comments

No comments found for this page.