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P0793 Acura Code - Intermediate Shaft Speed Sensor 'A' Circuit No Signal

Quick Answer

The P0793 code for Acura vehicles indicates a problem with the Intermediate Shaft Speed Sensor 'A' Circuit, specifically that there is no signal being detected. Common causes include Faulty Speed Sensor: The most common cause of the P0793 code is a malfunctioning intermediate shaft speed sensor, Wiring Issues: Damage to the wiring harness connecting the sensor to the ECM can also trigger this code, ECM Malfunction: A problem with the engine control module (ECM) can prevent it from receiving the signal from the speed sensor. 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
P0793 Acura indicates Intermediate Shaft Speed Sensor 'A' Circuit No Signal.
Common causes
Common causes include Faulty Speed Sensor: The most common cause of the P0793 code is a malfunctioning intermediate shaft speed sensor, Wiring Issues: Damage to the wiring harness connecting the sensor to the ECM can also trigger this code, ECM Malfunction: A problem with the engine control module (ECM) can prevent it from receiving the signal from the speed sensor.
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 11, 2024
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Code P0793 Acura Description

The P0793 code for Acura vehicles indicates a problem with the Intermediate Shaft Speed Sensor 'A' Circuit, specifically that there is no signal being detected. This sensor is responsible for monitoring the speed of the intermediate shaft in the transmission. When the sensor fails to send a signal, it can cause issues with the vehicle's transmission system, leading to poor performance and potential long-term damage if not addressed promptly.

OBDII Code P0793 Acura - Intermediate Shaft Speed Sensor 'A' Circuit No Signal
P0793 Acura Code - Intermediate Shaft Speed Sensor 'A' Circuit No Signal

Common Causes of P0793 Acura

  1. Faulty Speed Sensor: The most common cause of the P0793 code is a malfunctioning intermediate shaft speed sensor.
  2. Wiring Issues: Damage to the wiring harness connecting the sensor to the ECM can also trigger this code.
  3. ECM Malfunction: A problem with the engine control module (ECM) can prevent it from receiving the signal from the speed sensor.
  4. Transmission Fluid Contamination: Contaminated transmission fluid can interfere with the sensor's operation, leading to a lack of signal.
  5. Mechanical Faults: Internal transmission issues, such as a damaged intermediate shaft or gear, can also cause this code to appear.

Symptoms of P0793 Acura

  1. Check Engine Light: The most common symptom associated with the P0793 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Erratic Shifting: The transmission may experience erratic shifting, including delayed or harsh gear changes.
  3. Loss of Power: The vehicle may exhibit a loss of power, especially during acceleration.
  4. Transmission Slipping: The transmission may slip in and out of gear, making it difficult to maintain speed or drive smoothly.
  5. Overheating: In severe cases, the transmission may overheat due to the lack of proper gear engagement.

How to Fix P0793 Acura

  1. Diagnostic Testing: Begin by using a diagnostic scanner to verify the P0793 code and identify the specific cause of the issue.
  2. Inspect Wiring: Check the wiring harness for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
  3. Replace Speed Sensor: If the sensor is found to be faulty, remove and replace it with a new one.
  4. Clear Codes: After making the necessary repairs, clear the diagnostic trouble codes from the ECM and test drive the vehicle to ensure the issue has been resolved.
  5. Transmission Fluid Flush: Consider performing a transmission fluid flush and filter replacement to ensure the system is functioning properly.

Cost to Fix P0793 Acura

The cost of repairing the Intermediate Shaft Speed Sensor 'A' Circuit No Signal issue can vary depending on the specific cause of the problem and the labor rates in your area. In general, the cost of replacing the speed sensor itself can range from $100 to $200, with additional costs for diagnostic testing, wiring repairs, or fluid flushes. Labor rates at auto repair shops typically range from $80 to $150 per hour, so the total cost of repairs could be anywhere from $200 to $500 or more. It's advisable to get quotes from local repair shops to get a more accurate estimate for your specific situation.

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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 P0793 Acura Code

1. What does the OBDII code P0793 mean on an Acura?

P0793 indicates a problem with the Intermediate Shaft Speed Sensor 'A' Circuit, specifically a lack of signal being detected by the vehicle's transmission control module.

2. What are the common symptoms of code P0793 on an Acura?

Symptoms may include erratic shifting, transmission staying in one gear, reduced fuel efficiency, or the Check Engine Light illuminated.

3. What causes the P0793 code on an Acura?

Common causes include a faulty intermediate shaft speed sensor, damaged wiring or connectors, a malfunctioning transmission control module, or internal transmission issues.

4. Can driving with code P0793 cause further damage to an Acura?

Yes, driving with this code can lead to transmission overheating or accelerated wear due to improper shifting, potentially causing more severe damage.

5. How do I diagnose the P0793 code on my Acura?

Start by inspecting the intermediate shaft speed sensor, wiring, and connectors for damage or corrosion. Use a multimeter to test sensor functionality and verify signal continuity.

6. How do I fix code P0793 on an Acura?

Repair or replace the faulty intermediate shaft speed sensor, clean or fix damaged wiring or connectors, and reset the code using an OBDII scanner.

7. How much does it cost to repair an Acura with code P0793?

The cost depends on the issue. Replacing the intermediate shaft speed sensor typically costs $100–$300, including parts and labor, but severe transmission problems could be more expensive.

8. Can a faulty intermediate shaft speed sensor affect transmission performance?

Yes, a faulty sensor can disrupt the transmission's ability to determine shaft speed, resulting in poor shifting and reduced drivability.

9. Is code P0793 specific to Acura vehicles?

No, this code can appear in other makes and models with similar transmission setups, but the diagnostic and repair process may vary.

10. Do I need professional help to fix code P0793 on my Acura?

If you are experienced with automotive repairs, you may be able to fix it yourself. Otherwise, consult a certified mechanic to ensure proper diagnosis and repair.

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