AutoCodes – Mazda – P0794 Mazda

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

Quick Answer

This sensor detects the rotation speed of the input turbine. Common causes include Faulty Intermediate Shat Speed Sensor 'A', Intermediate Shat Speed Sensor 'A' harness is open or shorted, Intermediate Shat Speed Sensor 'A' circuit poor electrical connection. 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 Mazda indicates Intermediate Shaft Speed Sensor 'A' Circuit Intermittent.
Common causes: Common causes include Faulty Intermediate Shat Speed Sensor 'A', Intermediate Shat Speed Sensor 'A' harness is open or shorted, Intermediate Shat Speed Sensor 'A' circuit poor electrical connection.
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.

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Code Popularity 4,332

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 30, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0794 Mazda Description

This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (NC), the Engine Control Module (ECM) detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus, providing smooth gear shift.

OBDII Code P0794 Mazda - Intermediate Shaft Speed Sensor 'A' Circuit Intermittent - AutoCodes.com — P0794 Mazda Code - Intermediate Shaft Speed Sensor 'A' Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0794 Mazda?

Faulty Intermediate Shat Speed Sensor 'A'
Intermediate Shat Speed Sensor 'A' harness is open or shorted
Intermediate Shat Speed Sensor 'A' circuit poor electrical connection

How to Fix the DTC P0794 Mazda?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0794 Mazda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 P0794 Mazda Code

1. What does the OBDII code P0794 mean for a Mazda?

P0794 indicates an intermittent issue in the Intermediate Shaft Speed Sensor 'A' circuit, which monitors the rotation speed of the intermediate shaft in the transmission.

2. What are the common symptoms of a P0794 code in a Mazda?

Symptoms may include erratic or delayed shifting, transmission slipping, reduced fuel efficiency, and the check engine light being illuminated.

3. What causes the P0794 code in a Mazda?

Common causes include a faulty intermediate shaft speed sensor, damaged or loose wiring, corroded electrical connections, or issues within the transmission control module (TCM).

4. How can I diagnose the P0794 code in my Mazda?

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

5. Can a dirty or contaminated transmission fluid trigger a P0794 code?

Yes, dirty or low transmission fluid can affect sensor readings and lead to this code. Check and replace the fluid if necessary.

6. Is it safe to drive with a P0794 code in my Mazda?

Driving with a P0794 code is not recommended, as it can lead to further transmission damage or unsafe driving conditions due to erratic shifting.

7. How do I fix the P0794 code on my Mazda?

Repairs may involve replacing the intermediate shaft speed sensor, repairing or replacing damaged wiring, cleaning corroded connections, or reprogramming the TCM if necessary.

8. How much does it cost to repair a P0794 code in a Mazda?

Repair costs vary but typically range from $150 to $400 for parts and labor, depending on whether the issue is with the sensor, wiring, or TCM.

9. Can a P0794 code cause transmission failure in a Mazda?

If left unresolved, a P0794 code can lead to improper transmission operation and potentially contribute to long-term transmission damage.

10. Will clearing the code fix the P0794 issue in my Mazda?

Clearing the code may temporarily turn off the check engine light, but it wonâ€™t resolve the underlying issue. Proper diagnosis and repair are necessary to prevent the code from returning.